You usually buy a 16.516.5-ounce bottle of shampoo. there is a new bottle that says it gives you 30%30% more free. use the drop-down menus to build an equation that could be used to find the size of the larger bottle, xx.

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.