The mean and standard deviation of 10 observations are 20 and 8 respectively. Later on, it was observed that one observation was recorded as 50 instead of 40 . Then the correct variance is:

[JEE Main 2023, 15 Apr (Shift 1)]

Question

The mean and standard deviation of 10 observations are 20 and 8 respectively. Later on, it was observed that one observation was recorded as 50 instead of 40 . Then the correct variance is:

[JEE Main 2023, 15 Apr (Shift 1)]

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The mean and standard deviation of 10 observations are 20 and 8 respectively. Later on, it was observed that one observa…

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