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The mean and standard deviation of 20 ob...

The mean and standard deviation of `20` observations are found to be `10` and `2,` respectively. One rechecking, it was found that an observation `8` was incorrect. Calculate the correct mean and standard deviation in each of the following cases. `(i)`     If wrong item is omitted `(ii)`     If it is replaced by `12.`

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To solve the problem step by step, we will calculate the correct mean and standard deviation in two cases: (i) when the wrong item is omitted and (ii) when the wrong item is replaced by 12. ### Given Data: - Number of observations (n) = 20 - Mean (incorrect) = 10 - Standard deviation (incorrect) = 2 - Incorrect observation = 8 ...
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