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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. On 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.

Text Solution

Verified by Experts

The correct Answer is:
(i) 2, (ii) 1.98
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  • The mean and standard deviation of a random variable X are 10 and 5 respectively. Match the following.

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