Ryan is taking his family of 6 to see a movie. he got the movie ticket and 7.50 for a small popcorn/drink combo for each of his family members. ryan paid a total of 108. how do u write and slove and equation

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.