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A random sample size of 5 is denoted by X. Where E(x) = M (Mew) V(x)...

A random sample size of 5 is denoted by X.

Where E(x) = M (Mew)

V(x) = Sigma^2

Two potential estimators are:

(x1+x2+x3+x4+x5)/5

and

4(X1-X2-X3-X5)

which one is better and why?

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