1.

The mean and standard deviation of 20 observations are found to boe 10 and 2 respectively.On rechecking it was found that on observation 8 was incorrect.Calculate the correct mean and the standard deviation in each of the following cases.(ii)if it replaced by 12.

Answer»


ANSWER :(i) 10,1, 1.99 (II) 10.2, 1.98


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