Question: 13. If the variables Xi} (j = 1, .. . , n;; i = 1, .. . , s) are independently distributed as N(p.;, (

13. If the variables Xi} (j = 1, .. . , n;; i = 1, .. . , s) are independently distributed as N(p.;, ( 2 ), then E[En;(X;.- x.i] = (s - 1)02 + En;(p.; - p.i, E[EE(X;j - x;i] = (n - S)02 .

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