5. Suppose that X1,X2, ,Xm and Y1, Y2, ,Y, are independent random samples from N(ux,o) and N(uy, o), respectively. a. Find E(X - Y). b. Find V(X - Y)

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5. Suppose that X,, X2, -, Xm and Y1,Y2, ,Y, are independent random samples from N(Hx,o)
and N(Hy, o), respectively.
a. Find E(X – Ý).
b. Find V(X – Ý)
Transcribed Image Text:5. Suppose that X,, X2, -, Xm and Y1,Y2, ,Y, are independent random samples from N(Hx,o) and N(Hy, o), respectively. a. Find E(X – Ý). b. Find V(X – Ý)
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