The numbers of hours worked (per week) by 400 statistics students are shown below.
Homework Answers
| Number of hours | Frequency | Cumulative Frequency |
|---|---|---|
| 0 - 9 | 20 | 20 |
| 10 - 19 | 80 | 20 + 80 = 100 |
| 20 - 29 | 200 | 100 + 200 = 300 |
| 30 - 39 | 100 | 300 + 100 = 400 |
| Total = 400 |
Therefore, the cumulative percent frequency for hours is
300
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The numbers of hours worked (per week) by 400 statistics
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