Astore sells a workout outfit that consists of a jacket, a t-shirt, and a pair of shorts. the store purchases the jacket for $34, the t-shirt for $9, and the shorts for $12. the percent of markup is 28%. find the selling price of the outfit.

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.