The ratio of ed’s toy cars to pete’s toy cars was initially 5: 2. after ed gave 30 toy cars to pete, they each owned an equal number of toy cars. how many toy cars did they have altogether?

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.