The probability that Evelyn is on time for a given class is 40 percent. If there are 45 classes during the semester, what is the best estimate of the number of times out of 45 that Evelyn is on time to class? Round your answer to the nearest integer.

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.