According to insurance​ records, a car with a certain protection system will be recovered 86​% of the time. If 600 stolen cars are randomly​ selected, what is the mean and standard deviation of the number of cars recovered after being​ stolen? Round to the nearest thousandth.

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.