Traffic Violations

Find the interquartile range of the data set in Example 3–30.

Find Q_1 and Q_3. This was done in Example 3–34. Now Q_1 = 15 and Q_3 = 22. Next subtract Q_1 from Q_3.

IQR = Q_3 − Q_1 = 22 − 15 = 7

The interquartile range is equal to 7.