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 complaints are contained in the DATAfile named BBB. a. Construct a frequency distribution for the number of complaints by industry. Category Observed Frequency Bank Cable Car Cell Collection Total
b. Using a= .01, conduct a hypothesis test to determine if the probability of a complaint is the same for the five industries. What is your conclusion?
c. Which industry has the most complaints? - Select your answer - Dropping the industry with the most complaints using a = .05 , conduct a hypothesis test to determine if the probability of a complaint is the same for the remaining four industries. What is your conclusion?