[Recommended]the mean and standar deviation of set of 100 Observation

the mean and standar deviation of set of 100 Observation were worked out as 40 and 5 respectively by a computer who by mistake to…

the mean and standar deviation of set of 100 Observation were worked out as 40 and 5 respectively by a computer who by mistake to the value of 50 in place of 40 for one observation. recalculate the correct mean and variance
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