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In a set of 110ACTscores, where the mean is 26and the standard deviation is 5.39, (a) how many scores are expected to be lower than

In a set of 110ACTscores, where the mean is 26and the standard deviation is 5.39,

(a) how many scores are expected to be lower than 20.61(one standard deviation below themean)? (b) How many of the 110scores are expected to be below 36.78(two standard deviations above themean)?

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