The mean and standard deviation of 50 observations
\( \mathrm{P} \)... VIDEO
The mean and standard deviation of 50 observations
\( \mathrm{P} \) are 15 and 2 respectively. It was found that one
W incorrect observation was taken such that the sum of correct and incorrect observations is 70 . If the correct mean is 16 , then the correct variance is equal to:
(1) 10
(2) 36
(3) 43
(4) 60
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