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jon
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Joined: July 14th, 2002, 3:00 am

Significance of correlation coefficients

July 28th, 2009, 4:03 pm

Let's assume I have two time series, with given number of degrees of freedom, of independent normal random variables.Is it possible to generate is a 3-D graph showing:x = sample correlation, r, between -1 and 1y = actual correlation, p, between -1 and 1z= probability of sample correlation being x given actual correlation of yFor example if I wanted to know: is the probability that (i) the sample correlation is 0.2 given the actual correlation is 0 greater than (ii) the probability that the sample correlation is 0.9 given the actual correlation is 0.7? then I could read off the graph (0.2,0) and (0.9,0.7) etcWould love to hear from any stats experts out there.Cheers,Jon
 
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Traden4Alpha
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Joined: September 20th, 2002, 8:30 pm

Significance of correlation coefficients

July 28th, 2009, 7:07 pm

You might take a look at the Fisher transform. Note that the confidence interval is a function of sample size.
 
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jon
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Joined: July 14th, 2002, 3:00 am

Significance of correlation coefficients

July 28th, 2009, 8:10 pm

Thanks. This teasingly looks like it will be useful. Just need a crash refresher course in stats.