Answer: a) 73.84%, b) 77.64%.
Explanation:
Since we have given that
Average number of hours women spent per week watching TV = 40
Standard deviation =4.7 hours
Average number of hours men spent per week watching TV = 34
Standard deviation = 5.2 hours
a. What percent of the women watch TV less than 43 hours per week? (Round z-score computation to 2 decimal places and your final answer to 4 decimal places.)
So, X is less than 43 hours.
So, we get that

b. ) What percent of the men watch TV more than 30 hours per week? (Round z-score computation to 2 decimal places and your final answer to 4 decimal places.)
Since Y is more than 30 hours per week
So, it becomes

Hence, a) 73.84%, b) 77.64%.