Suppose that Y1 and Y2 have a coefficient correlation of p=.2 What is the coefficient correlation between a. 1+2Y1 and 3+4Y2 b. 1+2Y1 and 3-4Y2 c. 1-2Y1 and 3-4Y2
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What definition of "correlation coefficient" (or "coefficient of correlation" but not "coefficient correlation") are you using?
p=Cov(Y1,Y2)/(sigma1sigma2)
Good. Now what is Cov(Y1, Y2) and what are sigma1 and sigma2 for each problem?
That's the problem I'm having with the question, all the information in my first post is the information I was given. There were no parameters, variance or covariance given
Hey sherloes. Hint - Try expanding out the definition for the combination of random variables.
Thanks, I'll try that
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