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JEE Main & Advanced Mathematics Statistics Question Bank Mock Test - Statistics

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

    Answer:

    78


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