Two variates, x and y, are uncorrelated and have standard deviations a

| Two variates, x and y, are uncorrelated and have standard deviations and respectively. What is the correlation coefficient between x + y and x – y?

A.

B.

C.

D.

Right Answer is: C

SOLUTION

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=

=

=

=

X nd y are uncorrelated

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=

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