JEE MATHEMATICS MCQ: STATISTICS

1 Easy

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Application +4 | -1

In an experiment with 15 observations onx, the following results were available

\sum {x^2} = 2830,\;\sum x = 170

. One observation that was 20, was found to be wrong and was replaced by the correct value 30. Then, the corrected variance is

View answer and explanation

Correct option: A

78.0

Option A (

78.0

) is correct because it is the corrected variance calculated after replacing the incorrect observation with the correct value and using the variance formula.

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\bar X,

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