Standard deviation below the mean

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In a set of 105ACT scores, where the mean is 22and the standard deviation is 5.39,(a) how many scores are expected to be lower than 16.61(one standard deviation below the mean)? (b) How many of the 105scores are expected to be below 32.78(two standard deviations above the mean)?

Reference no: EM131335562

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Standard deviation below the mean : In a set of 105ACT scores, where the mean is 22and the standard deviation is 5.39,(a) how many scores are expected to be lower than 16.61(one standard deviation below the mean)? (b) How many of the 105scores are expected to be below 32.78(two stan..
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