To find the class width from the given frequency distribution table, we need to understand that the class width is the difference between the upper class boundary and the lower class boundary of any interval in the table.
Given the frequency distribution table:
| Number of Guests | Frequency |
|---------------------------|-----------------|
| 60 – 79---------------| 9 |
| 80 – 99---------------| 25 |
| 100 – 119--------------| 40 |
| 120 – 139--------------| 11 |
| 140 – 159--------------l 10 |
The class intervals are already given. To find the class width:
1. Identify the class boundaries:
- Lower boundary of the first class: 60
- Upper boundary of the last class: 159
2. Calculate the class width:
[tex]{Class\: width} = {Upper\: boundary} - {Lower\: boundary}[/tex]
[tex]{Class\: width} = 159 - 60[/tex]
[tex]{Class\: width} = 99[/tex]
Therefore, the class width is [tex]\boxed{99}[/tex]. Each class interval spans 99 units in the data collected for the number of people entering the mall atrium during 10-minute intervals.
