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thanks for your attention in problem but this problem was asked in NET Examination and the options given are
(i) 0
(ii) 1
(iii) -1
(iv) 0.5
so kindly suggest me the most likely ans.
KAUSHIK BHATTACHARJEE <kabonline07@...> wrote:
correlation calculated will be zero. However correlation is a liner measure of association(and not causality).So it is ok..x& y are perfectly non-linerly related.
this is a
textbook type example which says even if corr is zero there is a (very strong)relationship b/w the vars.
However I would like to know fronm the statisticians that is there any example that corr is high & the variables are causaly related but not linerely related?
hi dipesh in this case you wont get correlation coeff so just try some transformation may be log will work
dipesh089 <dipesh089@yahoo.com> wrote:
can anybody help me in solving this problem
Suppose the scatter plot of observations (Yi, Xi), i=1,2,3,…,n. shows that the points lies exactly on a second-degree curve symmetric about
x=a .Then the correlation coefficient between Y and X computed from this data is
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correlation calculated will be zero. However correlation is a liner measure of association(and not causality).So it is ok..x& y are perfectly non-linerly...
thanks for your attention in problem but this problem was asked in NET Examination and the options given are (i) 0 (ii) 1 (iii) -1 (iv) 0.5 so kindly...
Of possible answers given, yes, 0 is correct. Question should _really_ be, why? and how did you get that? Without going into the math & equations deeply,...
hi all, i am new member of this community. i have a problem and want its solution as soon as possible. we have two companies share closing prices of each day....
hai neha, you can use regression models.  in regression if hieght increses weight also increases, if hieght decreases weight decreses  so, it is Y on...
hi, no.. but the thing is we want to calculate number of days it takes to go from increased ratio 2(say) to MEAN ratio 1.5(say). regression model will only...
Hi, I guess Time Series Model will be a solution....but depends on the available backdata....model needs a good amount of paramiter understanding & may be...
yea, its time series data. we have daily closing prices of 2 companies and their ratios as data. even model is been fit. but now how to go for finding number...
Hi Neha, I dont think its a Time series problem, because in time series we use "time" to forecast a particular parameter and not vice versa. Here I will say...
Neha, take the difference between ratio of two time point & adjust time point accordingly. then use this variable in the model. Thanks & Regards, Subho. Â ...
hey, thanks for telling that. yea i think this will work for calculating number of days. can you please give somewhat more detail about it. ... From:...
assume day-1 Ratio 1.5 Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â d-2Â RÂ 1.7 Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â d3Â RÂ 1.5 Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â d4 RÂ Â ...
"if height increases weight also increases" IF and ONLY IF this is how height and weight are connected - linked. First we ask a question: does weight depend...
Hi Jay, I appeciate your suggestions but, I think you are forgetting the fact that its a complex thing to find out relation between two companies prices...
Hi Jay, I appeciate your suggestions but, I think you are forgetting the fact that its a complex thing to find out relation between two companies prices...
I do not understand the problem, although I tried a lot. Is it something like "We observe a two dimensional sequence (Xn,Yn)_n>=0 and we want to find its...
hi, dependence between 2 companies is there. say mean ratio is 1.5. so on an average airtel stock increase by 1.5 from hcl ratio. and everyday ratio keep on...
Hi folks, As a Statistician I think we should not solve each and every forecasting problem using Quantitative methods. Like this one where its not really...
Dear Neha i think ur problem can be answered by Black–Scholes model .The fundamental insight of Black-Scholes is that the option is implicitly priced if the...
I think the idea of a stochastic process is getting close. If you make typical textbook assumptions, then the two price series are related to two correlated...
1) Yes, I certainly agree that finding the relationship between the stock price of two companies is most difficult. And yes, I agree completely that finding...
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