In 2011, the industries with the most complaints to the Better Business Bureau were banks, cable and satellite television companies, collection agencies, cellular phone providers, and new car dealerships (USA Today, April 16, 2012), The results for a sample of 200 complaints are contained in the DATAfile named B8B. a. Construct a frequency distribution for the number of complaints by industry,
Category
Bank 26
Cable 42
Car 60
Collection 28
Total 156
b. Using α = .01, conduct a hypothesis test to determine if the probability of a complaint is the same for the five industries. The test-statistic is p-value- What is your conclusion?
C. Which industry has the most complaints? Dropping the industry with the most complaints using α-.05, conduct a hypothesis test to determine if the probability of a complaint is the same for the remaining four industries. The test-statistic is 7.43(to 2 decimals), What is your conclusion?