Audrey F.
asked • 10/16/21The weights of students in a large statistics class vary according to a Normal distribution with mean 145 pounds and standard deviation 18 pounds.
The weights of students in a large statistics class vary according to a Normal distribution with mean 145 pounds and standard deviation 18 pounds. 1. Approximately what range covers the middle 95% of the student weights?
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1 Expert Answer
Per the empirical rule, the middle 95% is within two standard deviations from the mean. Given the mean is 145 and the standard deviation is 18, the range would be 145 +/- 2 * 18 or 109 to 181.
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Bryant C.
What percent of the students weigh less than 145 pounds08/20/22