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A sample of n _ 11 scores has a mean of M _ 4. One person with a score of X _ 16 is added to the sample.
What is the value for the new sample mean?

  • Math -

    The sum of 11 scores was 4x11 = 44
    The sum of 12 scores becomes 44 +16 = 60
    The new mean (of 12 scores) is 60/12 = 5

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