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Suppose that test scores have a distribution with = 72 and = 8. (a) Find a probability that an average score of 36 randomly selected

Suppose that test scores have a distribution with = 72 and = 8.

(a) Find a probability that an average score of 36 randomly selected students is between 68 and 73.

(b) Find a probability that an average score of 16 randomly selected students is between 68 and 73.

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