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Chapter 2: Q 1.3. (page 89)

About what percent of calls lasted less than 30 minutes? 30 minutes or more?

Short Answer

Expert verified

65 percent of the calls lasted less than 30 minutes, while 35 percent lasted longer.

Step by step solution

01

Step 1. Given

Graph of call length (minutes) Vs cumulative frequency (%)

02

Step 2. Concept

A cumulative relative frequency graph can be used to depict an individual's location within a distribution or to find a specific percentile within the distribution.

03

Step 3. Explanation

The graph shows that 65 percent of the calls were less than 30 minutes in length. And about a third of the calls lasted more than 30 minutes.

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