Zach walks at a rate of 2.83 miles per hour. nora walks at a rate of
2.18 miles per hour. how many miles farther will zach have walked after
they each walk for 1.5 hours?

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.