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Question
Exhibit 2-1The numbers of hours worked (per week) by 400 statistics students are shown below.
| Number of hours | Frequency |
| 0 - 9 | 20 |
| 10 -19 | 80 |
| 20 - 29 | 200 |
| 30 - 39 | 100 |
a. is 9
b. is 10
c. is 39, which is: the largest value minus the smallest value or 39 ï€0 = 39
d. varies from class to class
Answer
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