Exercise 2 Page 312

We are given the number of hours Cheri works on each day. Let's find the mean and the median of this data.

Mean

In order to find the mean, or average, we need to find the sum of the hours and divide by the number of tests.

The mean of Cheri's number of hours worked is 5.

Median

The median of a set of data is the middle number, or the average of the two middle numbers, when placed in order from least to greatest. Let's start by writing the numbers in numerical order. 3, 4, 5, 6, 7 Since there is an odd number of tests, the median will be the middle number, which is 5.