# 8.3.1. Collecting and Organizing Data

The table below shows the days off taken by 40 workers during a year. Form a frequency table using the sets 5–, 10–, 15–, 20–, 25–, 30– to determine the number of workers who took 20 or more days off in that year.

 16 18 5 20 15 26 12 17 8 5 5 12 26 30 23 22 21 30 25 21 27 15 12 28 11 12 26 12 13 23 6 29 28 5 20 12 10 24 23 14
• A19
• B9
• C10
• D15

### Example

The table below shows the days off taken by 40 workers during a year. Form a frequency table using the sets 5–, 10–, 15–, 20–, 25–, 30– to determine the number of workers who took 20 or more days off in that year.

 16 18 5 20 15 26 12 17 8 5 5 12 26 30 23 22 21 30 25 21 27 15 12 28 11 12 26 12 13 23 6 29 28 5 20 12 10 24 23 14

### Solution

Count the number of days off for each set to identify the frequency.

 Sets of Days Off Frequency Total 6 10 5 9 8 2 40

To find the number of workers who took 20 or more days off, add the frequencies for the sets , , and .

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