The owners of an amusement park want to add more rides and an arcade in an open field. below is a sketch of their plan. the owners do not know the measurements of the field hight 30 yards 2/3 is n yds 1/3 is 40 yrds

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.