Cookies have to be in the open between 8 and 12 minutes and brownies have to be in the oven for 9 and 14 minutes. Which of the following represents all times t, when both are in the oven at the same time?

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.