Unit 5 Contents

These are the keystrokes that Michael's group used. Try them on your calculator.

Michael's group found the mean by adding the values for each head circumference and dividing by the number of students in the group. The mean for any data set is an average that is found by adding the values in the set of data and dividing by the number of values.

6. The data for Group 2 is shown below.

They used a calculator to find the mean for their data. The display on their calculator read 56.75.

1. Write calculator keystrokes for finding the mean for Group 2.
2. Is 56.75 cm closer to 56 cm or 57 cm?

3. Give the mean to the nearest whole centimeter.