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Let X and Y be two uncorrelated variables, then which of the following is incorrect if X and Y have same variance ?
Let X and Y be two uncorrelated variables, then which of the following is incorrect if X and Y have same variance ?
(A) corr(X, Y - X) = 1/(sqrt(2)) (B) corr(X, X + Y) = 1/(sqrt(2)) (C) cov(X + Y, X - Y) = 0 (D) var(X + Y) = var(X - Y)
A study of shares of four companies A, B, C and D over a period of five years showed the following details
Company. : A B C D
Average. : 25 15 18 20 S.D. : 3.6 2.4 3.6 3 The company with the most stable share is:
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mcq-regression-and-correlation-with-correct-answers1.pdf2.75 KB
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