In an experiment with 15 observations on x, then 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 [AIEEE 2003]

AIEEE 2003 Math Solved Paper

Section: Mathematics

Question : 65 of 66

Marks: +1, -0

In an experiment with 15 observations on x, then following results were available:
∑x2=2830,∑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

[AIEEE 2003]

188.66
177.33
8.33
78.00

Validate

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