I have folowing figures for last 8 weeks like -

Cost Earning Profit
1.00 3.08 2.08
1.21 3.00 1.79
1.07 3.69 2.62
0.92 3.70 2.78
1.04 3.07 2.04
1.05 2.94 1.89
1.13 3.76 2.63
1.14 5.00 3.86

I would like to determine the optimal level of cost equalising earning
in order  to avoid any loss , i.e.profit is 0 or > 0 .

Please help me.I wanted to calculate MEDIAN for earning.But Median is
used when there is large difference between Extreme Values.So I have
not foloowed that.
Advise me if some other statistical process could help me out.

Dear Author,

This is a gentle reminder that the deadline for paper submissions to
the Brain Science theme is approaching -- it's April 15, 2007.
Please upload your submissions via our on-line system at

http://www.stat.sinica.edu.tw/statistica/submission/  .

Please contact me if you have any problems with uploading your files
or have questions regarding the special issue.


With all the best,
Karen Li---on behalf of the Guest Editors
Editorial Assistant
Statistica Sinica
---------------------------------------------------------------
Guest Editors:

John Aston, Academia Sinica
Emery Brown, MIT/Massachusetts General Hospital
Keith Worsley, McGill University
Yingnian Wu, UCLA

Hello,

My name is Tracy Wolfe, Vice-President of Zingaro & Company
(www.zingaro.com), an executive search consulting firm specializing
in
the search and selection of executives for the healthcare industry.

I am currently working on an exciting assignment with my client,
Reliance Clinical Research Services (RCRS), a contract research
organization set up by the Reliance Group aimed at providing
world-class clinical research services to pharmaceutical,
biotechnology and medical device companies. The Reliance Group is
headquartered in Navi Mumbai, India and is recognized as India's most
prestigious business.

We are looking for dynamic individuals interested in relocating back
to India with a minimum of a Master's degree, PhD preferred and 3
years of experience in Biostatistics within the pharmaceutical
industry to assist in building a world-class Biostatistics
organization.

I would be grateful for your assistance in our efforts. If you know a
qualified candidate who might be interested, please contact me or
have
them contact me directly.

Respectfully,


Tracy Wolfe, PHR
Vice President
____________________________________________
Preferred Professional Recruiters - Solutions in Healthcare
Recruiting
a Zingaro Company
21936 Briarcliff Drive - Briarcliff, TX 78669-2012
Phone (512) 327-7275 - Fax (512) 327-1774
www.pprecruiters.com
twolfe@...
____________________________________________

Hello,

My name is Tracy Wolfe, Vice-President of Zingaro & Company
(www.zingaro.com), an executive search consulting firm specializing
in
the search and selection of executives for the healthcare industry.

I am currently working on an exciting assignment with my client,
Reliance Clinical Research Services (RCRS), a contract research
organization set up by the Reliance Group aimed at providing
world-class clinical research services to pharmaceutical,
biotechnology and medical device companies. The Reliance Group is
headquartered in Navi Mumbai, India and is recognized as India's most
prestigious business.

We are looking for dynamic individuals interested in relocating back
to India with a minimum of a Bachelor's degree and 4 years of
experience in clinical data management to assist in building a
world-class data management organization.

I would be grateful for your assistance in our efforts. If you know a
qualified candidate who might be interested, please contact me or
have
them contact me directly.

Respectfully,


Tracy Wolfe, PHR
Vice President
____________________________________________
Preferred Professional Recruiters - Solutions in Healthcare
Recruiting
a Zingaro Company
21936 Briarcliff Drive - Briarcliff, TX 78669-2012
Phone (512) 327-7275 - Fax (512) 327-1774
www.pprecruiters.com
____________________________________________

No question about it, Excel has a limit of 65536 rows and 256 columns.
You may need to use data from a dbase file that has more that 65536
records, but if the records that you really need to use are less than
65536 records, an alternative would be to import the data into Excel
through ODBC. You can do this using the Microsoft dBase ODBC driver,
where you can create a filter and just import into Excel the rows that
you need.

However, as it has been said in this thread, even though you can do
this, Excel is very slow at processing that many rows and is not a
nice alternative for statistics. Since you're a statician, look into
other alternatives. If you have a budget limitation, take a look at R.

HTH,
Gaby

> 3.1. Re: About EXCEL -here are few comments from my end.
> From: Kamalakar
> Messages

2.1. Re: About EXCEL
Posted by: "Kamalakar" ksj_stat@yahoo.co.in ksj_stat
Date: Wed Mar 28, 2007 5:42 pm

--- In Statisticians_group@yahoogroups.co.in, sunita guru
<sunitaguru2005@...> wrote:
>
> Hi Kamalarkar Jadhav,
>
> In excel at a time u can get only app 63,000 rows.This is the
limitation of excel.U can use Access or any other database package to
get above that.
>
> Regards,
> sunita
>
>
> Madan Gopal Kundu <madan4331@...> wrote:
> Dear Kamalakar Jadhav
>
> Your query is not clear at all. Please clarify to us about your
> query. Particularly,
> 1. what kind of 'handle' you want to do with your excel file?
> 2. Why do you want to 'handle' this?
> 3. currently what kind of problem you are facing during 'handle'-
ing
> of this file.
>
> Please clarify.
>
> Thanks & Regards
> MADAN
>
> --- In Statisticians_group@yahoogroups.co.in, "Kamalakar"
> <ksj_stat@> wrote:
> >
> > Hi Friend
> >
> >
> > i have query about how to handle large data (above 68000 rows
excel
> > limit) without open this database file .
> >
> >
> >
> >
> > Kamalakar jadhav
> >
>
>
>
>
>
>
> ---------------------------------
> Sucker-punch spam with award-winning protection.
> Try the free Yahoo! Mail Beta.
>

currently i am working as statistician in company. i handle large
data above 65536 records & i am writting Macro for Monthly
production rejection pareto analysis.this data i take from dbase
file .
but when i open this file in excel only 65536 records are seens
because of excel limitation.
i want to find a solution for that withaout opening this file dbase
file i want to handle this file for specific record.

thanks

Kamalakar Jadhav

3.1. Re: About EXCEL -here are few comments from my end.
Posted by: "Kamalakar" ksj_stat@yahoo.co.in ksj_stat
Date: Wed Mar 28, 2007 5:44 pm

--- In Statisticians_group@yahoogroups.co.in, kishore kumar
<kkkcubic@...> wrote:
>
> Your question is not clear, any way here are few comments from my
end.
>
> *) when u know the data is more than 68 K why u want to open using
excel????
> *).the max limit for excel is 65536 , dont open this file using xls.
>
> I think u want to know about the products/softwares/database which
can handle more than 68K...records.
>
> oracle (9i, 10 g or any other version)
> ms access
> ms sql server
> teradata
> sybase
> .... so on.
>
> even u can view the data of more than 68K records using
> textpad (offcourse even this have a limit but no probs for
68k>.....<xxx
> wordpad
> ....so on.
>
> Hope this is clear, let me know if u need some more info.
>
> Regards,
> Kishore Kumar.K
> HCL Techknowledges.
>
>
>
>
> Kamalakar <ksj_stat@...> wrote: Hi
Friend
>
> i have query about how to handle large data (above 68000 rows
excel
> limit) without open this database file .
>
> Kamalakar jadhav
>
>
>
>
>
>
> Kishore Kumar.K
>
>
> ---------------------------------
> We won't tell. Get more on shows you hate to love
> (and love to hate): Yahoo! TV's Guilty Pleasures list.
>
thanks for attention for me
acually my question is how to handle large data in excel but excel
has limit of (65536 X 256) ?

Kamlakar Jadhav

No question about it, Excel has a limit of 65536 rows and 256 columns.
You may need to use data from a dbase file that has more that 65536
records, but if the records that you really need to use are less than
65536 records, an alternative would be to import the data into Excel
through ODBC. You can do this using the Microsoft dBase ODBC driver,
where you can create a filter and just import into Excel the rows that
you need.

However, as it has been said in this thread, even though you can do
this, Excel is very slow at processing that many rows and is not a
nice alternative for statistics. Since you're a statician, look into
other alternatives. If you have a budget limitation, take a look at R.

HTH,
Gaby

> 3.1. Re: About EXCEL -here are few comments from my end.
>    From: Kamalakar
> Messages

2.1. Re: About EXCEL
    Posted by: "Kamalakar" ksj_stat@... ksj_stat
    Date: Wed Mar 28, 2007 5:42 pm

--- In Statisticians_group@..., sunita guru
<sunitaguru2005@...> wrote:
>
> Hi Kamalarkar Jadhav,
>
>   In excel at a time u can get only app 63,000 rows.This is the
limitation of excel.U can use Access or any other database package to
get above that.
>
>   Regards,
>   sunita
>
>
> Madan Gopal Kundu <madan4331@...> wrote:
>           Dear Kamalakar Jadhav
>
> Your query is not clear at all. Please clarify to us about your
> query. Particularly,
> 1. what kind of 'handle' you want to do with your excel file?
> 2. Why do you want to 'handle' this?
> 3. currently what kind of problem you are facing during 'handle'-
ing
> of this file.
>
> Please clarify.
>
> Thanks & Regards
> MADAN
>
> --- In Statisticians_group@..., "Kamalakar"
> <ksj_stat@> wrote:
> >
> > Hi Friend
> >
> >
> > i have query about how to handle large data (above 68000 rows
excel
> > limit) without open this database file .
> >
> >
> >
> >
> > Kamalakar jadhav
> >
>
>
>
>
>
>
> ---------------------------------
> Sucker-punch spam with award-winning protection.
>  Try the free Yahoo! Mail Beta.
>

currently i am working as statistician in company. i handle large
data above 65536 records  & i am writting Macro for Monthly
production rejection pareto analysis.this data i take from dbase
file .
but when i open this file in excel only 65536 records are seens
because of excel limitation.
i want to find a solution for that withaout opening this file dbase
file i want to handle this file for specific record.

thanks

Kamalakar Jadhav


3.1. Re: About EXCEL -here are few comments from my end.
    Posted by: "Kamalakar" ksj_stat@... ksj_stat
    Date: Wed Mar 28, 2007 5:44 pm

--- In Statisticians_group@..., kishore kumar
<kkkcubic@...> wrote:
>
> Your question is not clear, any way here are few comments from my
end.
>
> *) when u know the data is more than 68 K why u want to open using
excel????
> *).the max limit for excel is 65536 , dont open this file using xls.
>
> I think u want to know about the products/softwares/database which
can handle more than 68K...records.
>
> oracle (9i, 10 g or any other version)
> ms access
> ms sql server
> teradata
> sybase
> .... so on.
>
> even u can view the data of more than 68K records using
> textpad (offcourse even this have a limit but no probs for
68k>.....<xxx
> wordpad
> ....so on.
>
> Hope this is clear, let me know if u need some more info.
>
> Regards,
> Kishore Kumar.K
> HCL Techknowledges.
>
>
>
>
> Kamalakar <ksj_stat@...> wrote:                                  Hi
Friend
>
>  i have query about how to handle large data (above 68000 rows
excel
>  limit) without open this database file .
>
>  Kamalakar jadhav
>
>
>
>
>
>
> Kishore Kumar.K
>
>
> ---------------------------------
> We won't tell. Get more on shows you hate to love
> (and love to hate): Yahoo! TV's Guilty Pleasures list.
>
thanks for attention for me
acually my question is how to handle large data in excel but excel
has limit of (65536 X 256) ?


Kamlakar Jadhav

--- In Statisticians_group@..., kishore kumar
<kkkcubic@...> wrote:
>
> Your question is not clear, any way here are few comments from my
end.
>
> *) when u know the data is more than 68 K why u want to open using
excel????
> *).the max limit for excel is 65536 , dont open this file using xls.
>
> I think u want to know about the products/softwares/database which
can handle more than 68K...records.
>
> oracle (9i, 10 g or any other version)
> ms access
> ms sql server
> teradata
> sybase
> .... so on.
>
> even u can view the data of more than 68K records using
> textpad (offcourse even this have a limit but no probs for
68k>.....<xxx
> wordpad
> ....so on.
>
> Hope this is clear, let me know if u need some more info.
>
> Regards,
> Kishore Kumar.K
> HCL Techknowledges.
>
>
>
>
> Kamalakar <ksj_stat@...> wrote:                                  Hi
Friend
>
>  i have query about how to handle large data (above 68000 rows
excel
>  limit) without open this database file .
>
>  Kamalakar jadhav
>
>
>
>
>
>
> Kishore Kumar.K
>
>
> ---------------------------------
> We won't tell. Get more on shows you hate to love
> (and love to hate): Yahoo! TV's Guilty Pleasures list.
>
thanks for attention for me
acually my question is how to handle large data in excel but excel
has limit of (65536 X 256) ?


Kamlakar Jadhav

--- In Statisticians_group@..., sunita guru
<sunitaguru2005@...> wrote:
>
> Hi Kamalarkar Jadhav,
>
>   In excel at a time u can get only app 63,000 rows.This is the
limitation of excel.U can use Access or any other database package to
get above that.
>
>   Regards,
>   sunita
>
>
> Madan Gopal Kundu <madan4331@...> wrote:
>           Dear Kamalakar Jadhav
>
> Your query is not clear at all. Please clarify to us about your
> query. Particularly,
> 1. what kind of 'handle' you want to do with your excel file?
> 2. Why do you want to 'handle' this?
> 3. currently what kind of problem you are facing during 'handle'-
ing
> of this file.
>
> Please clarify.
>
> Thanks & Regards
> MADAN
>
> --- In Statisticians_group@..., "Kamalakar"
> <ksj_stat@> wrote:
> >
> > Hi Friend
> >
> >
> > i have query about how to handle large data (above 68000 rows
excel
> > limit) without open this database file .
> >
> >
> >
> >
> > Kamalakar jadhav
> >
>
>
>
>
>
>
> ---------------------------------
> Sucker-punch spam with award-winning protection.
>  Try the free Yahoo! Mail Beta.
>

currently i am working as statistician in company. i handle large
data above 65536 records  & i am writting Macro for Monthly
production rejection pareto analysis.this data i take from dbase
file .
but when i open this file in excel only 65536 records are seens
because of excel limitation.
i want to find a solution for that withaout opening this file dbase
file i want to handle this file for specific record.

thanks

Kamalakar Jadhav

Your question is not clear, any way here are few comments from my end.

*) when u know the data is more than 68 K why u want to open using excel????
*).the max limit for excel is 65536 , dont open this file using xls.

I think u want to know about the products/softwares/database which can handle more than 68K...records.

oracle (9i, 10 g or any other version)
ms access
ms sql server
teradata
sybase
.... so on.

even u can view the data of more than 68K records using
textpad (offcourse even this have a limit but no probs for 68k>.....<xxx
wordpad
....so on.

Hope this is clear, let me know if u need some more info.

Regards,
Kishore Kumar.K
HCL Techknowledges.




Kamalakar <ksj_stat@yahoo.co.in> wrote:

Hi Friend

i have query about how to handle large data (above 68000 rows excel
limit) without open this database file .

Kamalakar jadhav

Kishore Kumar.K

---

We won't tell. Get more on shows you hate to love
(and love to hate): Yahoo! TV's Guilty Pleasures list.

Hi,

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regards

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Mindscope Staffing

Hi Friend

i have query about how to handle large data (above 68000 rows excel
limit) without open this database file .

Kamalakar jadhav

My answer is:

http://www.burns-stat.com/pages/Tutor/spreadsheet_addiction.html


Patrick Burns
patrick@...
+44 (0)20 8525 0696
http://www.burns-stat.com


Kamalakar wrote:

> Hi Friend
>
> i have query about how to handle large data (above 68000 rows excel
> limit) without open this database file .
>
> Kamalakar jadhav
>
>

Dear Kamalakar Jadhav

Your query is not clear at all. Please clarify to us about your
query. Particularly,
1. what kind of 'handle' you want to do with your excel file?
2. Why do you want to 'handle' this?
3. currently what kind of problem you are facing during 'handle'-ing
of this file.

Please clarify.

Thanks & Regards
MADAN

--- In Statisticians_group@yahoogroups.co.in, "Kamalakar"
<ksj_stat@...> wrote:
>
> Hi Friend
>
>
> i have query about how to handle large data (above 68000 rows excel
> limit) without open this database file .
>
>
>
>
> Kamalakar jadhav
>

Dear Kamalakar Jadhav

Your query is not clear at all. Please clarify to us about your
query. Particularly,
1. what kind of 'handle' you want to do with your excel file?
2. Why do you want to 'handle' this?
3. currently what kind of problem you are facing during 'handle'-ing
of this file.

Please clarify.

Thanks & Regards
MADAN

--- In Statisticians_group@..., "Kamalakar"
<ksj_stat@...> wrote:
>
> Hi Friend
>
>
> i have query about how to handle large data (above 68000 rows excel
> limit) without open this database file .
>
>
>
>
> Kamalakar jadhav
>

Hi All,

We are into HR activities related to Staffing & Recruitments. We cater
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We provide people on permanent and Contract basis for our clients all
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regards

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Mindscope.Staffing

Hi Friend


i have query about how to handle large data (above 68000 rows excel
limit) without open this database file .




Kamalakar jadhav

--- In Statisticians_group@..., "sukhdev mishra"
<devmishra_u@...> wrote:
>
> --- In Statisticians_group@..., "jshq8612"
> <jshq8612@> wrote:
> >
> > hello everyone,I am researching a question,compare the value of
> two or
> > three blood markers or combine these markers diagnosis the early
> > cancer.Which software or statistic package is better? And how to
> plot
> > the ROC curve ,and compare the AUC.Someone can give me some
advice?
> > Thanks!!!
> >
>
>
> Hi ....Receiver-Operating-Characteristic (ROC) analysis can be
> performed in STATA packages in a nice manner. We can do it in other
> powerful stats packages too like SAS but it is a matter of quite
> understanding of SAS programming which may be difficult for an
> inexperienced person in SAS.SO better to go for STATA.I think
either
> u want to know the validity (sensitivity/Specificity) of a new test
> or to compare a diagnostic test with a gold standard or with
another
> one of existing tests.
>
> Sukhdev
>
dear Sukhdev,thank you for your advice!

--- In Statisticians_group@..., "jshq8612"
<jshq8612@...> wrote:
>
> hello everyone,I am researching a question,compare the value of
two or
> three blood markers or combine these markers diagnosis the early
> cancer.Which software or statistic package is better? And how to
plot
> the ROC curve ,and compare the AUC.Someone can give me some advice?
> Thanks!!!
>


Hi ....Receiver-Operating-Characteristic (ROC) analysis can be
performed in STATA packages in a nice manner. We can do it in other
powerful stats packages too like SAS but it is a matter of quite
understanding of SAS programming which may be difficult for an
inexperienced person in SAS.SO better to go for STATA.I think either
u want to know the validity (sensitivity/Specificity) of a new test
or to compare a diagnostic test with a gold standard or with another
one of existing tests.

Sukhdev

Hello,

My name is Tracy Wolfe, Vice-President of Zingaro & Company
(www.zingaro.com), an executive search consulting firm specializing in
the search and selection of executives for the healthcare industry.

I am currently working on an exciting assignment with my client,
Reliance Clinical Research Services (RCRS), a contract research
organization set up by the Reliance Group aimed at providing
world-class clinical research services to pharmaceutical,
biotechnology and medical device companies.   The Reliance Group is
headquartered in Navi Mumbai, India and is recognized as India's most
prestigious business.

We are looking for dynamic individuals interested in relocating back
to India with a minimum of a Master's degree, PhD preferred and 3
years of experience in Biostatistics within the pharmaceutical
industry to assist in building a world-class Biostatistics
organization.

I would be grateful for your assistance in our efforts. If you know a
qualified candidate who might be interested, please contact me or have
them contact me directly.

Respectfully,


Tracy Wolfe, PHR
Vice President
____________________________________________
Preferred Professional Recruiters - Solutions in Healthcare Recruiting
a Zingaro Company
21936 Briarcliff Drive - Briarcliff, TX 78669-2012
Phone (512) 327-7275 - Fax (512) 327-1774
www.pprecruiters.com
twolfe@...
____________________________________________

Hello,

My name is Tracy Wolfe, Vice-President of Zingaro & Company
(www.zingaro.com), an executive search consulting firm specializing in
the search and selection of executives for the healthcare industry.

I am currently working on an exciting assignment with my client,
Reliance Clinical Research Services (RCRS), a contract research
organization set up by the Reliance Group aimed at providing
world-class clinical research services to pharmaceutical,
biotechnology and medical device companies.   The Reliance Group is
headquartered in Navi Mumbai, India and is recognized as India's most
prestigious business.

We are looking for dynamic individuals interested in relocating back
to India with a minimum of a Bachelor's degree and 4 years of
experience in clinical data management to assist in building a
world-class data management organization.

I would be grateful for your assistance in our efforts. If you know a
qualified candidate who might be interested, please contact me or have
them contact me directly.

Respectfully,


Tracy Wolfe, PHR
Vice President
____________________________________________
Preferred Professional Recruiters - Solutions in Healthcare Recruiting
a Zingaro Company
21936 Briarcliff Drive - Briarcliff, TX 78669-2012
Phone (512) 327-7275 - Fax (512) 327-1774
www.pprecruiters.com
____________________________________________

Hi thivya,

 

Cox regression (or proportional hazards regression) is method for investigating the effect of several variables upon the time a specified event takes to happen. In the context of an outcome such as death this is known as Cox regression for survival analysis. The method does not assume any particular "survival model" but it is not truly non-parametric because it does assume that the effects of the predictor variables upon survival are constant over time and are additive in one scale.

 

Check this link for more detailed with  example

 

http://www.statsdirect.com/help/regression_and_correlation/cox_regression.htm

http://www.statsdirect.com/help/regression_and_correlation/cox_regression.htm

 

If u do have any more queries let me know.

 

sunita

thivya praba <thivya_friends@yahoo.co.in> wrote:

hai,

  i'm interested in knowing abt cox regression and its application field.could anyone explain me with an exmpl, if possible?

thanks in advance,

Thivya

---

Here’s a new way to find what you're looking for - Yahoo! Answers

---

Need Mail bonding?
Go to the Yahoo! Mail Q&A for great tips from Yahoo! Answers users.

hello everyone,I am researching a question,compare the value of  two or
three blood markers or combine these markers diagnosis the early
cancer.Which software or statistic package is better? And how to plot
the ROC curve ,and compare the AUC.Someone can give me some advice?
Thanks!!!

hai,

  i'm interested in knowing abt cox regression and its application field.could anyone explain me with an exmpl, if possible?

thanks in advance,

Thivya

---

Here’s a new way to find what you're looking for - Yahoo! Answers

Hello Sunitha,

 

It is great to hear from you. Having finished your MSc Statistics, you should be having a good theoretical knowledge in the discipline of statistics and it is imperative. As far as i'm concerned, working on two areas, both teaching and working with medical proffessionals, it takes a great deal of practical statistics and how you generate the output that they need using statistical softwares.

 

SPSS is a very good software to start with and it covers almost all topics at basic and a large portion of advanced levels and hence can answer a wide variety of research questions. Besides this, before moving into biostatistics, i strongly recommend you to read basic books on biostatistics which cover both statistics at an applied level and epidemiology, research methods and Clinical trials. Being a biostatistician, you need to know about the study designs, various standard research problems and so on. Knowledge on regression methods would be helpful at an advanced stage. With that I would like to leave it to you to hit hard on this really interesting discipline. Do ask if you should have any clarifications.

 

With best wishes,

solomon.

sunita guru <sunitaguru2005@yahoo.com> wrote:

Hello Solomon Sir,

 

I have done my MSc Statistitics.At present i am working as a Research Statistician in the field of Demographics(Ahmedabad).

 

I am very much intereseted to work in the field of biostatistics.I do have some knowledge of SPSS.

 

Please can u help me out in what way i should prepare to shift in the field of biostatistics.

 

Regards,

sunita

 

Solomon Christopher <sol_chris82@yahoo.co.in> wrote:

Dear Shamsi,

 

I work for the dept of biostatistics at Christian Medical College, Vellore after completion of my MSc Biostatistics from the same college.

 

I have only solved the problem in part. If you could provide more information on the problem, we can work through the solution. Thanks for your concern.

 

luv,

solomon.

Muhammad Ibrahim Shamsi <abrahamshamsi@yahoo.com> wrote:

Thank You Dear Christopher
i wonder you have solve my problem!
thankyou very much again
sir please tell me about your self if you dont mind.

----- Original Message ----
From: Solomon Christopher <sol_chris82@yahoo.co.in>
To: Statisticians_group@yahoogroups.co.in
Sent: Thursday, March 15, 2007 5:16:43 PM
Subject: Re: [Statisticians_group] probability question - a simplified answer

Dear M I Shamsi and all others,

 

Your question is indeed interesting. I would like to attempt to answer this question in the light of comments provided by Gabriela Carbo.

 

In order to answer the question, i make a few assumptions, which if changed would alter the answer that i give, and altering each of the assumption would be a seperate statistical problem which of great interest.

 

Assumptions:

1. The chance of choosing each of the four options is equal

 

2. Each question is independent in the sense that knowing the correct answer for a question will have no bearing on answering any other question

 

3. The two persons agree on the answers by chance alone.

 

Stating these assumptions, which is rather maximum simplification of the answer, we see that

 

The choice of anser for each of the question is 1/4 and hence for both to agree on the same answer is (1/4)^2 = 1/16.  (By assumption 1 and 3)

 

The chance of such an agreement to occur on all 50 questions is (1 / 16) ^ 50. (by assumption 2)

 

This is probably the most simplified answer and suggestions are welcome to improve on this by modifying each of the assumption.

 

Solomon Christopher.

 

Muhammad Ibrahim Shamsi <abrahamshamsi@ yahoo.com> wrote:

Consider a test paper with 50 multiple choice questions, each having 4 options. There is only 1 correct answer. Two persons have the following conversation:

1st - I had 15 A's, 20 B's and 15 D's

2nd - Likewise

What is the probability that both have the exact same correct options meaning all A's, B's and D's for one person are same for the other aswell?

I dont know the answer. I thought its an interesting problem and need ur help.

hope for early response.

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Hello Solomon Sir,

 

I have done my MSc Statistitics.At present i am working as a Research Statistician in the field of Demographics(Ahmedabad).

 

I am very much intereseted to work in the field of biostatistics.I do have some knowledge of SPSS.

 

Please can u help me out in what way i should prepare to shift in the field of biostatistics.

 

Regards,

sunita

 

Solomon Christopher <sol_chris82@yahoo.co.in> wrote:

Dear Shamsi,

 

I work for the dept of biostatistics at Christian Medical College, Vellore after completion of my MSc Biostatistics from the same college.

 

I have only solved the problem in part. If you could provide more information on the problem, we can work through the solution. Thanks for your concern.

 

luv,

solomon.

Muhammad Ibrahim Shamsi <abrahamshamsi@yahoo.com> wrote:

Thank You Dear Christopher
i wonder you have solve my problem!
thankyou very much again
sir please tell me about your self if you dont mind.

----- Original Message ----
From: Solomon Christopher <sol_chris82@yahoo.co.in>
To: Statisticians_group@yahoogroups.co.in
Sent: Thursday, March 15, 2007 5:16:43 PM
Subject: Re: [Statisticians_group] probability question - a simplified answer

Dear M I Shamsi and all others,

 

Your question is indeed interesting. I would like to attempt to answer this question in the light of comments provided by Gabriela Carbo.

 

In order to answer the question, i make a few assumptions, which if changed would alter the answer that i give, and altering each of the assumption would be a seperate statistical problem which of great interest.

 

Assumptions:

1. The chance of choosing each of the four options is equal

 

2. Each question is independent in the sense that knowing the correct answer for a question will have no bearing on answering any other question

 

3. The two persons agree on the answers by chance alone.

 

Stating these assumptions, which is rather maximum simplification of the answer, we see that

 

The choice of anser for each of the question is 1/4 and hence for both to agree on the same answer is (1/4)^2 = 1/16.  (By assumption 1 and 3)

 

The chance of such an agreement to occur on all 50 questions is (1 / 16) ^ 50. (by assumption 2)

 

This is probably the most simplified answer and suggestions are welcome to improve on this by modifying each of the assumption.

 

Solomon Christopher.

 

Muhammad Ibrahim Shamsi <abrahamshamsi@ yahoo.com> wrote:

Consider a test paper with 50 multiple choice questions, each having 4 options. There is only 1 correct answer. Two persons have the following conversation:

1st - I had 15 A's, 20 B's and 15 D's

2nd - Likewise

What is the probability that both have the exact same correct options meaning all A's, B's and D's for one person are same for the other aswell?

I dont know the answer. I thought its an interesting problem and need ur help.

hope for early response.

Send instant messages to your online friends http://uk.messenger .yahoo.com

---

Here’s a new way to find what you're looking for - Yahoo! Answers

Send instant messages to your online friends http://uk.messenger.yahoo.com

---

Here’s a new way to find what you're looking for - Yahoo! Answers

---

8:00? 8:25? 8:40? Find a flick in no time
with theYahoo! Search movie showtime shortcut.

Dear Shamsi,

 

I work for the dept of biostatistics at Christian Medical College, Vellore after completion of my MSc Biostatistics from the same college.

 

I have only solved the problem in part. If you could provide more information on the problem, we can work through the solution. Thanks for your concern.

 

luv,

solomon.

Muhammad Ibrahim Shamsi <abrahamshamsi@yahoo.com> wrote:

Thank You Dear Christopher
i wonder you have solve my problem!
thankyou very much again
sir please tell me about your self if you dont mind.

----- Original Message ----
From: Solomon Christopher <sol_chris82@yahoo.co.in>
To: Statisticians_group@yahoogroups.co.in
Sent: Thursday, March 15, 2007 5:16:43 PM
Subject: Re: [Statisticians_group] probability question - a simplified answer

Dear M I Shamsi and all others,

 

Your question is indeed interesting. I would like to attempt to answer this question in the light of comments provided by Gabriela Carbo.

 

In order to answer the question, i make a few assumptions, which if changed would alter the answer that i give, and altering each of the assumption would be a seperate statistical problem which of great interest.

 

Assumptions:

1. The chance of choosing each of the four options is equal

 

2. Each question is independent in the sense that knowing the correct answer for a question will have no bearing on answering any other question

 

3. The two persons agree on the answers by chance alone.

 

Stating these assumptions, which is rather maximum simplification of the answer, we see that

 

The choice of anser for each of the question is 1/4 and hence for both to agree on the same answer is (1/4)^2 = 1/16.  (By assumption 1 and 3)

 

The chance of such an agreement to occur on all 50 questions is (1 / 16) ^ 50. (by assumption 2)

 

This is probably the most simplified answer and suggestions are welcome to improve on this by modifying each of the assumption.

 

Solomon Christopher.

 

Muhammad Ibrahim Shamsi <abrahamshamsi@ yahoo.com> wrote:

Consider a test paper with 50 multiple choice questions, each having 4 options. There is only 1 correct answer. Two persons have the following conversation:

1st - I had 15 A's, 20 B's and 15 D's

2nd - Likewise

What is the probability that both have the exact same correct options meaning all A's, B's and D's for one person are same for the other aswell?

I dont know the answer. I thought its an interesting problem and need ur help.

hope for early response.

Send instant messages to your online friends http://uk.messenger .yahoo.com

---

Here’s a new way to find what you're looking for - Yahoo! Answers

Send instant messages to your online friends http://uk.messenger.yahoo.com

---

Here’s a new way to find what you're looking for - Yahoo! Answers