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a final exam in statistics has a mean of 73 with a standard deviation of 7.73. Assume that a random sample of 24 students is selected and the mean test score of the sample is computed. What percentage of sample means are less than 70?

  • statistics -

    Here you are dealing with means rather than individual scores.

    Z = (score-mean)/SEm

    SEm = SD/√n

    Use same table as indicated in your later post.

  • statistics -

    where is this formula located on excel?

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