Chapter 4, Problem 28E

To determine

To Explain: the measure of centre for each side is using and the difference might exist.

Explanation of Solution

The two sides may be using definitions of averages are Mean, Median, or Mode.

Mean, median, and mode are all different definitions for average, and are not compulsory the same. In this case, the company is likely using the mean, which is an average of all sick day uses incorporating long term illnesses would bias the average upward. The union is likely using the median, which is more frequency- dependent and reflective of the most of t-used number of sick day.