1. Do business executives have a preference for an airline carrier? The responses from a random sample of 200 business executives were: Delta, 60; United, 50; and Southwest, 48; the remainder selected...

1. Do business executives have a preference for an airline carrier? The responses from a random sample of 200 business executives were: Delta, 60; United, 50; and Southwest, 48; the remainder selected U.S. Airways. Do the data indicate that executives have an airline preference?

2. An insurance company in Chattanooga, Tennessee, wanted to determine the importance of price as a factor in choosing a hospital in that region. A random sample of 450 consumers was asked to select not important, important, or very important as an answer. Respective numbers selecting these answers were 142, 175, and 133. Test the null hypothesis that a randomly chosen consumer is equally likely to select each of these three answers.