Question: 6. Let X1 , ..., Xn be a random sample from N ( u , 62) distribution. Find the mean and variance of b) n

6. Let X1 , ..., Xn be a random sample from N ( u , 62) distribution. Find the mean and variance of b) n Zi=1(Xi - M ) 2 , b) - ZY=1(Xi - X )2 , n C) 1 Li=1 (Xi - X )2 . n-1

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