To create a frequency table with seven classes, we follow these steps:

1. Find the Range:

   • Maximum value: 64
   • Minimum value: 18
   • Range = $64 - 18 = 46$

2. Determine the Class Width:

   • Class width = $\frac{\text{Range}}{\text{Number of classes}} = \frac{46}{7} \approx 6.57$
   • Round up to 7 (to ensure coverage of all data points).

3. Create the Class Intervals:
   Start with the minimum value (18) and add the class width to determine the class intervals.

4. Tally the Data:
   Go through each number and assign it to its appropriate class interval.

Frequency Table:

Class Interval	Frequency
18 - 24	10
25 - 31	10
32 - 38	10
39 - 45	7
46 - 52	6
53 - 59	2
60 - 66	2

This table shows the distribution of your data into seven classes.

Would you like further details on how the frequencies were tallied, or any other clarification?

Related questions:

1. How do you calculate cumulative frequency for these classes?
2. How do you determine the median from this frequency table?
3. How can we plot a histogram using this data?
4. How can you calculate the relative frequency for each class?
5. How do you find the mode from a frequency table?

Tip: Class width is usually rounded up to ensure all data fits into the intervals!