-What-is-the-mean-of-the-values-in-the-distribution-algebra-homework-help

The number of hours that college freshman spend studying each week is normally distributed with a mean of 8 hours and a standard deviation of 5.5 hours. What percentage of students spend between 2.5 and 19 hours studying each week?

A. 34%

B. 68%

C. 47.5%

D. 81.5%

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