Data set 1 has a mean of 120 and a mad of 4. data set 2 has a mean of 132 and a mad of 3.
what can you conclude about the two distributions?
choose exactly two answers that are correct.
a. the means-to-mad ratio is 3.
b. the means-to-mad ratio is 4.
c. the distributions are somewhat similar.
d. the distributions are different.

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.