Which statement explains the difference between a plane and a ray? a ray contains an infinite number of points, and a plane does not have width or depth. a ray can be used to create other geometric shapes, and a plane is always part of a shape. a plane does not have a formal definition, and a ray is described through undefined terms. a plane continues infinitely in one direction, and a vertex does not have width or depth.

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.