I have completed my M.Sc. in Statistics in 2004. I right now want to pursue some other course in statistics to enhance my knowledge through distance/part time.Please suggest me some good courses and institutes.
Thank you Tracy, Thank you Isaac, But I want next to use beta1, for example, in a macro ( permuting the points in the data set). And I need all the betas, in the macro's output to appear in a column. Thanks again, Mihaela
Isaac Dialsingh <consult@...> wrote:
How about putting the output in MS Word and deleting what you don't want?
'Pray like if everything depended on God and then work like everything depended on you'
Subject: [Statisticians_group] SAS output to contain only the estimators for regress.
model
Hello,
I have a data ( Y, X ) and I fitted the regression model : y = beta0 + beta1 * x in SAS. I need now to print only the estimates for beta0 and beta1. I mean I don't want to have in the output information about other estimates. Just the betas. And also in SAS. Can anyone give a hint for this ?
Subject: [Statisticians_group] SAS output to contain only the estimators for regress. model
Hello,
I have a data ( Y, X ) and I fitted the regression model : y = beta0 + beta1 * x in SAS. I need now to print only the estimates for beta0 and beta1. I mean I don't want to have in the output information about other estimates. Just the betas. And also in SAS. Can anyone give a hint for this ?
I have a data ( Y, X ) and I fitted the regression model : y = beta0 + beta1 * x in SAS. I need now to print only the estimates for beta0 and beta1. I mean I don't want to have in the output information about other estimates. Just the betas. And also in SAS. Can anyone give a hint for this ?
it doesn't require any programming knowledge...but..if any previous knowledge is there in programmin...it is definitely advantage...to learn SAS..
Right now where r u...& Wat r u doing....presently..?
All the Best...
Bye,
Chandu B
Kumara Datta <yag_199@...> wrote:
hi
Chandu , this is kumara datta. i would like to know about sas , I have completed MBA(FINANCE) and i am gradute in Stats , presently i am pursuing actuarial course ,how much it costs for certification and does it require Programing background ?
yours freindly
KUMARA DATTA
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Chandu , this is kumara datta. i would like to know about sas , I have completed MBA(FINANCE) and i am gradute in Stats , presently i am pursuing actuarial course ,how much it costs for certification and does it require Programing background ?
yours freindly
KUMARA DATTA
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Hi..All,
I am Chandu, I have done my M.Sc (Applied Statistics).
I am a SAS Certified. I am looking for "Analsyt" related job....
like Business Analyst, Statistical Analsyt, Data Analyst...etc.,
If any such opportunites r there...kindly mail to me....
my mail ID:- chandra_sekhar_bcs@...
Thanks & Regards,
Chandu B
At 01:43 AM 10/26/2006, Stat wrote:
>I saw a note on homoskedasticity of a Least Square
> which I am giving below:
>
>"The basic version of the assumes that, the expected value of all error
>terms, in absolute value, is the same at any given point. Thus, the
>expected value of any given error term, squared, is equal to the variance
>of all the error terms taken together. This assumption is called
>homoskedasticity."
>
>But I cannot understand that how the phrase "the expected value of all
>error terms, in absolute value, is the same at any given point" and the
>phrase "the expected value of any given error term, squared, is equal to
>the variance of all the error terms taken together" are giving equal meaning.
>
>However I know what is the Homoskedasticity and its importance in Least
>square theory. But I cannot relate these two phrase.
Least squares is optimal for normally distributed errors, each independent
and each with the same variance. If the variances are all equal, then so
are any expectations of any function of the variances. This includes the
mean absolute deviation (from the mean).
================================================================
Robert A. LaBudde, PhD, PAS, Dpl. ACAFS e-mail: ral@...
Least Cost Formulations, Ltd. URL: http://lcfltd.com/
824 Timberlake Drive Tel: 757-467-0954
Virginia Beach, VA 23464-3239 Fax: 757-467-2947
"Vere scire est per causas scire"
================================================================
Dear all Statisticians,
I saw a note on homoskedasticity of a Least Square
which I am giving below:
"The basic version of the assumes that, the
expected value of all error terms, in absolute value,
is the same at any given point. Thus, the expected
value of any given error term, squared, is equal to
the variance of all the error terms taken together.
This assumption is called homoskedasticity."
But I cannot understand that how the phrase "the
expected value of all error terms, in absolute value,
is the same at any given point" and the phrase "the
expected value of any given error term, squared, is
equal to the variance of all the error terms taken
together" are giving equal meaning.
However I know what is the Homoskedasticity and its
importance in Least square theory. But I cannot relate
these two phrase.
Can anyone help?
thanks and regards,
stat
__________________________________________________________
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Hello
I am asking for a little help, because I'd like to do a research on
nursing-related issue but I dunno where to find samples of nursing
researches or related literature.
Hope anyone can help me.
Thank you
Ronan
Hello
I am asking for a little help, because I'd like to do a research on
nursing-related issue but I dunno where to find samples of nursing
researches or related literature.
Hope anyone can help me.
Thank you
Ronan
It is related to Regression analysis and it is used for detecting
outlier. I suggest you to take any standard book on Regression Analysis
(e.g., Regression Analysis by Montogomery and Peck)for the details on
Cook's distance.
Regards
MADAN
--- In Statisticians_group@..., joseph qadery
<dost_statistics@y...> wrote:
>
> what is cook's distans?please help me in this.
>
>
>
> ---------------------------------
> Do you Yahoo!?
> Get on board. You're invited to try the new Yahoo! Mail.
>
STATISTICA SINICA
Call for submissions on
STATISTICAL CHALLENGES AND ADVANCES IN BRAIN SCIENCE
Statistics and probability theory play key roles in cutting edge
brain research. Leading examples include non-linear time series
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neuroimaging datasets. This special issue will highlight statistical
and probabilistic topics related to all aspects of brain science,
including but not limited to, computational neuroscience, neuronal
modeling, and structural and functional neuroimaging.
Submissions preferably will provide either methodological or
theoretical advances in the statistical aspects of brain science or
demonstrate applications of techniques using statistics in
neuroscience. Priority will be given to papers that are assessed to
be, statistically and scientifically speaking, the most innovative,
comprehensive, and of interest to a wide readership.
Papers submitted to the special issue will be reviewed according to
the regular procedure of the journal. Accepted papers will appear in
a single issue of Statistica Sinica, scheduled for 2008. Please
contact John Aston for questions on the suitability of your paper(s).
Submissions must be made online through the journal site at
http://www3.stat.sinica.edu.tw/statistica/
Please use the LaTeX article template, also available at the above
site, for preparing your manuscript submission. The deadline for
submission is January 31, 2007. Authors wishing to receive email
alerts as the deadline approachs may contact the editorial assistant,
Karen Li (Karen at stat.sinica.edu.tw).
Guest
Editors:
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Emery Brown, MIT/Massachusetts General Hospital
Keith Worsley, McGill University
Yingnian Wu, UCLA
----------------------------------------------------------------------
**Statistica Sinica endeavors to meet the needs of statisticians
faced with a rapidly changing world. It publishes significant and
original articles that promote the principled use of statistics along
with related theory and methods in quantitative studies, essential to
modern technologies and
sciences.**
hi can any one know about which website i am able to know about all sas/ statistical companies in india rather then given below companies..
regards
manohar
----- Original Message ---- From: "Dominic, Littish" <littish@...> To: Statisticians_group@... Sent: Sunday, August 27, 2006 1:31:42 AM Subject: Re: [Statisticians_group] about software
Hello,
Now SAS is the most popularized software in India.
The main companies that using SAS,
Pfizer, GSK, Novartis, Quintiles, Wipro, TCS, GVK bio, Dr reddys, Ranbaxy, US technologies, Kreara, Allianz cornhill, GE (Genpact), etc...
At 11:39 PM 10/18/2006, you wrote:
>Dear Robert,
>
>Thank you very much. This is exactly what I need.
>One more thing. Could you please give me name of any reference paper(s)
>for this? Actually I have compulsion to justify my sample size.
>
>With regards,
>MADAN
>
I'd start with the book Statistical Methods for Rates and Proportions by
Fleiss.
Your exact problem (i.e., equivalence testing) may not be covered, but you
can use the logic from the standard problems and apply it to your case.
================================================================
Robert A. LaBudde, PhD, PAS, Dpl. ACAFS e-mail: ral@...
Least Cost Formulations, Ltd. URL: http://lcfltd.com/
824 Timberlake Drive Tel: 757-467-0954
Virginia Beach, VA 23464-3239 Fax: 757-467-2947
"Vere scire est per causas scire"
================================================================
Yes....Our Statisticians_group was launched on this day of previous year, that is on 19/Oct/2005. Today is 19/Oct/2006... So it is the first birthday of Statisticians_group.
Currently our group has nearly 900 boisterous members across the world. This group has proved its potentiality in exchanging information in the field of Statistics in this one year. I hope that in future days it will spread among more and more peoples from the field of the statistics and it will become more powerful platform for the discussion of statistics related issues in true sense.
On this occassion, I would like to congratulate all the present members (And also to those who were in our group but left because of some reasons...) of this group... And also, at the same time, I wish that this day will return back to us year after year.
One more thing. Could you please give me
name of any reference paper(s) for this? Actually I have compulsion to justify
my sample size.
With regards,
MADAN
From:Statisticians_group@... [mailto:Statisticians_group@...] On Behalf Of Robert A LaBudde Sent: 18 October 2006 21:07 To:Statisticians_group@... Subject: Re: [Statisticians_group]
Sample size in clinical trial
At 03:24 AM 10/18/2006, Madan wrote:
>I have question regarding sample size calculation in Clinical trial. How
>does the sample size calculation differ for Superiority, Non-inferiority
>and Equivalence trials?
><snip>
>Sample size formula will be: n = 2*variance*((z(alpha/2) +
>z(1-beta)/Delta)**2 (with certain assumptions)
The formula should be n = 2*variance*[z(alpha) + z(1-beta/k)]^2/Delta^2
1. Use z(alpha) for all three cases. The null hypothesis branches in each
test are all 1-sided.
2. The first two cases (Superiority and Inferiority) have only 1-sided
contributions to beta. The Equivalence test has contributions from each
side, so beta would be expected to be 2x larger, everything else being equal.
3. Therefore the first two tests would use k=1 and the last k=2, if you
really want the same beta value for all three. The alternative would be use
have beta twice as large for the third case.
================================================================
Robert A. LaBudde, PhD, PAS, Dpl. ACAFS e-mail: ral@...
Least Cost Formulations,
Ltd. URL: http://lcfltd.com/
824 Timberlake
Drive
Tel: 757-467-0954 Virginia Beach, VA23464-3239
Fax: 757-467-2947
"Vere scire est per causas scire"
================================================================
(i) The information contained in this e-mail message is intended only for the confidential use of the recipient(s) named above. This message is privileged and confidential. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail, and delete the original message.
(ii) The sender confirms that Ranbaxy shall not be responsible if this email message is used for any indecent, unsolicited or illegal purposes, which are in violation of any existing laws and the same shall solely be the responsibility of the sender and that Ranbaxy shall at all times be indemnified of any civil and/ or criminal liabilities or consequences there.
At 03:24 AM 10/18/2006, Madan wrote:
>I have question regarding sample size calculation in Clinical trial. How
>does the sample size calculation differ for Superiority, Non-inferiority
>and Equivalence trials?
><snip>
>Sample size formula will be: n = 2*variance*((z(alpha/2) +
>z(1-beta)/Delta)**2 (with certain assumptions)
The formula should be n = 2*variance*[z(alpha) + z(1-beta/k)]^2/Delta^2
1. Use z(alpha) for all three cases. The null hypothesis branches in each
test are all 1-sided.
2. The first two cases (Superiority and Inferiority) have only 1-sided
contributions to beta. The Equivalence test has contributions from each
side, so beta would be expected to be 2x larger, everything else being equal.
3. Therefore the first two tests would use k=1 and the last k=2, if you
really want the same beta value for all three. The alternative would be use
have beta twice as large for the third case.
================================================================
Robert A. LaBudde, PhD, PAS, Dpl. ACAFS e-mail: ral@...
Least Cost Formulations, Ltd. URL: http://lcfltd.com/
824 Timberlake Drive Tel: 757-467-0954
Virginia Beach, VA 23464-3239 Fax: 757-467-2947
"Vere scire est per causas scire"
================================================================
Kiddan Kjetil!!
You are right. I was thinking SAS as the default language for
statisticians. My apologies. Can u now suggest something?
Thanks
Zorawar
--- In Statisticians_group@..., "Kjetil Halvorsen"
<kjetilbrinchmannhalvorsen@g...> wrote:
>
> Hola!
>
> May I suggest that when making Programming-language specific
questions in
> this group, the progaramming language be specified in the subject
line.
>
> Sincerely yours,
>
> Kjetil B Halvorsen
>
> On 10/16/06, zorrwarr <zorrwarr@y...> wrote:
> >
> > Hi all!!
> > I have a dataset with 200,000 rows in which one variable has two
> > types of data (character and numerical) and the second data type
> > occurs after 50,000 rows, so I am unable to use guessing rows and
> > port functions. To get my work done for a while I can copy and mix
> > one data type row with the other in any of the first 100 rows and
can
> > use guessingrows function.
> >
> > But can anyone suggest a better way in which I just can assign
that
> > this variable can have both data types (as variant in VB) or it
would
> > only be a charater type variable.
> >
> > Thanks you
> > Zorawar
> >
> >
> >
> >
> >
>
I have question
regarding sample size calculation in Clinical trial. How does the sample size calculation differ for Superiority,
Non-inferiority and Equivalence trials?
Suppose we want to
compare population mean (with respect to some character) of Test drug with that
of Reference drug. Then our hypothesis will be:
For superiority trial,
Ho : Mu(t) - Mu(r) <=
Delta
H1 : Mu(t) - Mu(r) >
Delta
For inferiority trial,
Ho : Mu(r) - Mu(t) >
Delta
H1 : Mu(r) - Mu(t) <=
Delta
For equivalence trial,
Ho : Mu(t) - Mu(r) >
Delta or Mu(r) - Mu(t) > Delta
H1 : -Delta<= Mu(t) -
Mu(r) <= Delta
Here, Mu(t) and Mu(r)
are means of test drug and reference drug populations respectively, Delta being
the clinically meaningful significance difference.
Now for the following
hypothesis and given alpha level of significance and (1-beta)*100% power
Ho : Mu(t) - Mu(r) =Delta
H1 : Mu(t) - Mu(r) ^=
Delta
Sample size formula will
be: n = 2*variance*((z(alpha/2) + z(1-beta)/Delta)**2 (with certain assumptions)
Now how can I use this
formula for Superiority, Inferiority and Equivalence trials?
Is there any reference
paper that can help me in this regard?
Thanks in advance.
Regards
MADAN
(i) The information contained in this e-mail message is intended only for the confidential use of the recipient(s) named above. This message is privileged and confidential. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail, and delete the original message.
(ii) The sender confirms that Ranbaxy shall not be responsible if this email message is used for any indecent, unsolicited or illegal purposes, which are in violation of any existing laws and the same shall solely be the responsibility of the sender and that Ranbaxy shall at all times be indemnified of any civil and/ or criminal liabilities or consequences there.
use format when exporting data to ascii files, without use of format sas assigns default format for exporting your data which might me integer.
Mihir
dipesh jayswal <dipeshjayswal@...> wrote:
Dear group,
I wanted to export my data set in to ASCII formated file with the extension '.DAT' . I tried it and got success but i got the fractional values got converted in integers so please suggest me the way out.
Its not Sysstat. It is SYSTAT. u can get the info from www.systat.com
Thanks,
Murthy
manohar kalwani <mannu_iitb@...> wrote:
hi phani, i mail to ur friend sanjay but could find his reply. can u tell contact info of this comapny.. website or tell num etc
----- Original Message ---- From: Phani kumar <phanikumar_hcu@...> To:
Statisticians_group@... Sent: Monday, October 16, 2006 9:58:25 PM Subject: Re: [Statisticians_group] About SIS Stats in Bangalore
Hi Swathi,
I hope you are looking for the job in Sysstat(not SIS stat) in Bangalore.
Two years back, my friend Sanjay has worked in this company. So, you can reach him through sanjay_siva_kumar@....
ALL THE BEST.
Phani
swathi shetty <swathisona_shetty@...> wrote:
hi,
Do anybody know about the company SIS Stats in Bangalore?Can anybody tell me about that company and how to apply for a job in that company?
Thanks in advance,
Kind Regards,
Swathi
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Adinarayana Murty
-----------------------------------------------------------------------------------------------------To call in the statistician after the experiment is done may be no more than asking him to perform a postmortem examination: he may be able to say what the experiment died of - R.A.Fisher
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hi phani, i mail to ur friend sanjay but could find his reply. can u tell contact info of this comapny.. website or tell num etc
----- Original Message ---- From: Phani kumar <phanikumar_hcu@...> To: Statisticians_group@... Sent: Monday, October 16, 2006 9:58:25 PM Subject: Re: [Statisticians_group] About SIS Stats in Bangalore
Hi Swathi,
I hope you are looking for the job in Sysstat(not SIS stat) in Bangalore.
Two years back, my friend Sanjay has worked in this company. So, you can reach him through sanjay_siva_kumar@....
ALL THE BEST.
Phani
swathi shetty <swathisona_shetty@...> wrote:
hi,
Do anybody know about the company SIS Stats in Bangalore?Can anybody tell me about that company and how to apply for a job in that company?
Thanks in advance,
Kind Regards,
Swathi
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Hi all!!
I have a dataset with 200,000 rows in which one variable has two
types of data (character and numerical) and the second data type
occurs after 50,000 rows, so I am unable to use guessing rows and
port functions. To get my work done for a while I can copy and mix
one data type row with the other in any of the first 100 rows and can
use guessingrows function.
But can anyone suggest a better way in which I just can assign that
this variable can have both data types (as variant in VB) or it would
only be a charater type variable.
Hi all!!
I have a dataset with 200,000 rows in which one variable has two
types of data (character and numerical) and the second data type
occurs after 50,000 rows, so I am unable to use guessing rows and
port functions. To get my work done for a while I can copy and mix
one data type row with the other in any of the first 100 rows and can
use guessingrows function.
But can anyone suggest a better way in which I just can assign that
this variable can have both data types (as variant in VB) or it would
only be a charater type variable.
Thanks you
Zorawar
I wanted to export my data set in to ASCII formated file with the extension '.DAT' . I tried it and got success but i got the fractional values got converted in integers so please suggest me the way out.
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