jee-main 2022 Q68

jee-main · India · session1_26jun_shift2 Measures of Location and Spread

Let the mean of 50 observations is 15 and the standard deviation is 2. However, one observation was wrongly recorded. The sum of the correct and incorrect observations is 70. If the mean of the correct set of observations is 16, then the variance of the correct set is equal to
(1) 10
(2) 36
(3) 43
(4) 60

Let the mean of 50 observations is 15 and the standard deviation is 2. However, one observation was wrongly recorded. The sum of the correct and incorrect observations is 70. If the mean of the correct set of observations is 16, then the variance of the correct set is equal to\\
(1) 10\\
(2) 36\\
(3) 43\\
(4) 60

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