You're assisting a craft vendor at a fair who sells 5 knit hats for $9.50 each. she then sells the
sixth and seventh for $11.25 each, and the eighth and ninth for $8.75 each. at the end of the fair, she
is charged 15% of her gross earnings for the booth space. how much money does she make after
paying for the booth space?
a. $41.31
b. $66.95
c. $74.37
d. $87.50

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.