Every year, the Better Business Bureau (BBB) receives complaints from customers. Here are some complaints the BBB received in a recent year.

14,156 complaints about auto repair and service

8568 complaints about insurance companies

6712 complaints about mortgage brokers

15,394 complaints about telephone companies

5841 complaints about travel agencies

Use a Pareto chart to organize the data. What source is the greatest cause of complaints?

a. Find the frequency or relative frequency for each data entry.

b. Position the bars in decreasing order according to frequency or relative frequency.

c. Interpret the results in the context of the data.