To determine how well airline companies serve their customers, a study was conducted. The results produced the following customer ratings: 3% excellent, 28% good, 45% fair, and 24% poor. In a separate study of telephone companies' service, the following customer ratings using a sample of 400 adults were found: 24 excellent, 124 good, 172 fair and 80 poor. Is the distribution of the customer ratings for telephone companies different from the distribution of customer ratings for airline companies? If the p-value is greater than the value of significance level for this problem what conclusion you can draw from this analysis? Select one: a. Distribution of customer rating for telephone companies is not significantly different from the airline companies b. The distribution of customer rating for telephone companies is different from the airline companies c. The distribution of customer rating for telephone companies is independent of the airline companies d. The distribution of customer rating for telephone companies is dependent of the airline companies. Last school year, the student body of a local university consisted of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors. A sample of 300 students taken from this year's student body showed the following number of students in each classification: freshmen 83, sophomores 68 , juniors 85 , and seniors 64 . The school superintendent is interested in determine whether there has been a significant change in the classification between last school year and this school year. Which of the following is the correct null hypothesis for this problem? Select one: a. the classification for this school year is independent of last school year classification b. the classification for this school year is dependent on last school year classification c. there is a significant change in the classification between last school year and this school year d. None of the above is the correct statement