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What percentage of sample means are less than 70?

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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?

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This solution is comprised of a detailed explanation of calculating the Z score and probability. In this solution, step-by-step explanation of this complicated topic provides students with a clear perspective of calculating the Z score and probability.

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