Riley has set up a six week payment schedule to pay for his upcoming school camp. he has already put down a 15 percent deposit and will pay the balance in 6 weekly instalments. If he paid $34.20 deposit, how much is he paying each week?

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.