In an experiment with 15 observations on x the following results were available : ∑x2=2830,∑x=170 One observation, 20, was found to be wrong and was replaced by the correct value 30. Then the corrected variance is

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In an experiment with 15 observations on x the following resul

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In an experiment with 15 observations on x the following results were available :
$\sum x^{2} = 2830, \sum x = 170$
One observation, 20, was found to be wrong and was replaced by the correct value 30. Then the corrected variance is

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In an experiment with 15 observations on x the following results were available :

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

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

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Question Text

In an experiment with 15 observations on x the following results were available :

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

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