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Find the probability that the mean score of a class of size

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Reference no: EM132399924

Let us assume that the average score in a class is normally distributed with a mean of 78 and standard deviation of 5.5.

A) Find the probability that the mean score of a class of size 30 will be under 75. Based upon your results, would it be unusual to find a class of size 30 where the mean score is less than 75? Explain.

Reference no: EM132399924

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