statistics

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A sample of n = 7 scores has a mean of M = 5. After one new score is added to the sample, the new mean is found to be M = 6. What is the value of the new score? (Hint: Compare the values for ƩX before and after the score was added.

  • statistics -

    Mean = sum/n

    5 = sum/7

    5(7) = 7(sum/7)

    35 = sum

    35 to 42

    42-35 = 7

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