The volume of a box is 400 in.^3in. 3 . The height is 5 in. What is the area of the base of the box? A 80 in. B 80 in.^2in. 2 C 8 in. D 8 in.^2in. 2

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.