The mean and the variance of 10 observations are given to be 4 and 2 r – McqOptions

MCQOPTIONS

1.	The mean and the variance of 10 observations are given to be 4 and 2 respectively. If every observation is multiplied by 2, the mean and the variance of the new series will be respectively.
A.	8 and 20
B.	8 and 4
C.	8 and 8
D.	80 and 40
Answer» D. 80 and 40

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