JEE Main & Advanced Mathematics Statistics Question Bank Numerical Value Type Questions - Statistics

  • question_answer
    In an experiment with 15 observations on x, the 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. The corrected variance is

    Answer:

    78


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