Sam Houston Park has a trail called "Piper's Way" that is 7 miles long. You walk 1/4 of the trail, but then find a grizzly bear and ride it back to camp. How much of the trail did you walk? first

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.