To calculate the relative frequency of the sixth class, follow these steps:

1. Determine the total number of classes: You've provided 7 classes.

2. Identify the sixth class: The sixth class is 1393–1452.

3. Calculate the total number of data points: To find the total number of data points, sum the frequencies of all classes. However, you haven’t provided the actual frequencies of each class, so I'll assume you have this information.

4. Determine the frequency of the sixth class: Let's denote this frequency as $f_6$.

5. Calculate the relative frequency: $\text{Relative Frequency} = \frac{\text{Frequency of the sixth class}}{\text{Total number of data points}} = \frac{f_6}{\text{Total number of data points}}$ This fraction should be simplified.

6. Simplify the fraction: Make sure the fraction $\frac{f_6}{\text{Total number of data points}}$ is in its simplest form.

Since specific frequencies weren't provided, the exact relative frequency can't be calculated here. However, if you provide the frequencies, I can help you with the exact relative frequency calculation.

Would you like to provide those details, or do you need further clarification?

Follow-Up Questions:

1. What are the frequencies of each class?
2. Do you need help simplifying fractions?
3. How do you calculate the total number of data points?
4. What does a relative frequency tell you about the data?
5. Are you familiar with other types of frequencies like cumulative frequency?

Tip:

Always ensure to simplify your fractions to their lowest terms to make your results more interpretable and comparable.