Bookstores like towns with a good percentage of college educated people. National data shows that 71% of collegegraduates have read a book in the past year, compared to 54% of the general population age 18 and over. A bookstoreis doing a market survey in a certain county to decide whether to open a bookstore. The company likes to openbookstores if a population is above the national educational level. The bookstore takes a simple random sample of1,000 people age 18 and over and finds the average educational level to be 14 years with a standard deviation of 5years. a. Construct a 90% confidence interval for the mean educational level in the county. b. The nationwide average educational level to be 13 years of schooling completed person age 18 and over. Dothe data provide sufficient evidence to conclude that a new bookstore should be buil