1.

If X and Y are independent then SD (X − Y) is________________?

A. SD(X)−SD(Y)
B. SD(X)+SD(Y)
C. SD(X)+SD(Y)−−−−−−−−−−−−−−√
D. Var(X)+Var(Y)−−−−−−−−−−−−−−−√
Answer» C. SD(X)+SD(Y)−−−−−−−−−−−−−−√


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