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CORRELATION AND REGRESSION

Maths & Stats

The coefficient correlation between two variables X and Y is -.75 and their covariance is -15. If variance of X is 25, find the second moment about mean of Y-series?

Sr the Unique

CA Inter

★ 10

13-May-23 17:00

185

Answers (3)

The second moment about mean means variance then there's a formula that co eff of correlation=cov(x,y)/s.d of y *s.d of x Now variance is equal to square of s.d then s.d of 25 is 5 -0.75=-15/(5*y) Y=4 then variance is square of y it is 16