According to South Dakota Department of Health, the mean number of hours of TV viewing for each week is higher among adult women than men. A current study showed women spent an average of 30 hours per week watching TV and men 22 hours per week. Suppose that the distribution of hours watched follows the normal distribution for both groups, and that the standard deviation among the women is 4.1 hours and is 5 hours for men.
(a) Determine percent of the women watch TV less than 35 hours per week? (Round z-score computation to 2 decimal places and your final answer to 4 decimal places.)
(b) What percent of the men watch TV more than 18 hours per week? (Round z-score computation to 2 decimal places and your final answer to 4 decimal places.)
(c) How many hours of TV do the four percent of women who watch the most TV per week watch? Find the comparable value for the men. (Round your answers to 3 decimal places.)
Number of hours :
Women
Men