Cumulative Frequency Graphs and Percentiles Worksheet with Answer Key

What's on the worksheet

1. A help desk logged the lengths of 50 phone calls, in minutes.
2. After a hailstorm, a weather office measured the diameters of 54 hailstones, in millimeters.
3. The finishing times of the 200 runners in a city marathon, in minutes, are grouped below.
4. A forest survey measured the trunk diameters of 120 trees in one plot.
5. A marathon's 200 finishing times were first grouped into six 30 minute classes from 180 to 360 minutes, with counts 12, 34, 58, 50, 30 and 16.
6. Two data sets of 30 values each are both grouped into the classes 0 to 10, 10 to 20 and 20 to 30, with counts 6, 18 and 6 in each data set.