A large company is interested in improving the efficiency of its customer service and decides to examine the length of the business phone calls made to clients by its sales staff. A cumulative relative frequency graph is shown below from data collected over the past year. According to the graph, the shortest 80% of calls will take how long to complete?

(a) Less than 10 minutes

(b) At least 10 minutes

(c) Exactly 10 minutes

(d) At least 5.5 minutes

(e) Less than 5.5 minutes

Transcribed Image Text:

Percent 100- Length of Phone Calls 80- 60- 40- 20- 0- -N 8 10 Minutes 222 12 14 16