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If the mean number of hours of television watched by teenagers per week is 12 with a standard deviat

Question: If the mean number of hours of television watched by teenagers per week is 12 with a standard deviation of 2 hours, what proportion of teenagers watch 16 to 18 hours of TV a week? (Assume a normal

distribution.)

A. 4.5%

B. 4.2%

C. 0.3%

D. 2.1%

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