J. D. is saving up to buy a Nook color tablet. It is advertised on the web site for $169. He has $79 saved. To make money, he feeds his grandparents cats when they go away. His grandmother pays him $5.00 a day. How many days will he need to take care of his grandparents’ cats in order to have enough money to buy the Nook?

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.