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MHT CET 2024 Mathematics question

MathematicsStatisticsMHT CET 2024

In an experiment with 15 observations for x the following results were available One observation 20 was found to be wrong and was replaced by the correct value 30. Then the corrected variance is

Answer: (A)

Solution

Corrected . Corrected . With , the corrected mean is and the variance is \frac{\sum x^2}{n}\bar$

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Question ID VK-096882