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AIEEE 2003 Math Solved Paper

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Question : 65

Total: 66

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

188.66
177.33
8.33
78.00

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