# While calculating

Given, Uncorrected mean is 40 and corrected SD is 10 and N = 100

To Find: Find the correct mean and SD

Explanation: Here,

Then,

The corrected sum of observation

So,

Variance =16

Incorrect

Correct

Correct

Correct SD,

Correct SD,

SD = 6.62

Variance = 6.62×6.62

Hence, Variance = 43.82

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