Data was collected for 76 randomly selected 10-minute intervals. For each ten-minute interval, the number of people entering the atrium of a large mall were recorded. The data is summarized in the table below.
Number of Guests	Frequency
100 – 104	28
105 – 109	13
110 – 114	17
115 – 119	5
120 – 124	13
What is the class width?

To determine the class width, we calculate the difference between the upper and lower boundaries of any one class. 

For this data set:

- The first class is \(100 - 104\).
- The lower boundary is 100.
- The upper boundary is 104.

The class width is calculated as:

\[
\text{Class Width} = \text{Upper Boundary} - \text{Lower Boundary} + 1
\]

So,

\[
\text{Class Width} = 104 - 100 + 1 = 5
\]

Therefore, the class width is **5**.

Would you like more details or have any other questions?

Here are 5 related questions you might find interesting:
1. How do you determine the number of classes in a frequency distribution?
2. What is the importance of selecting an appropriate class width in a frequency distribution?
3. How would changing the class width affect the appearance of a histogram?
4. Can you calculate the midpoint of each class?
5. What is the difference between class width and class interval?

**Tip:** When working with frequency distributions, always check that the classes are mutually exclusive and collectively exhaustive to avoid any overlap or missing data.

Understand how to calculate the class width in a frequency distribution using a detailed step-by-step explanation. This problem involves analyzing data on the number of people entering a mall atrium, covering key statistical concepts. Suitable for Grades 10-12.

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