Example 8-13. If X ~ B (n , p), show that : E(X-r)* = " ; Cov (, X) =- pq n

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Example 8.13. If X ~ B (n , p), show that :
E(X-r)* = ,
2
pq .
Cou(스, 프)
X. n- X
pq
%3D
= -
n
Transcribed Image Text:Example 8.13. If X ~ B (n , p), show that : E(X-r)* = , 2 pq . Cou(스, 프) X. n- X pq %3D = - n
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