Find the value of f(-2). y = f(x)
10
8
6
4
2
-10
-8
.
-4
-2
2
4
6
8
10
-2
-4
-6
-8
-10

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.