To correctly determine the class width for each class in the frequency table, we use the following formula:

$\text{Class Width} = \text{Lower Class Limit of Next Class} - \text{Lower Class Limit of Current Class}$

Let’s calculate the class width for the given classes.

1st Class: $0.20 - 0.29$

The lower class limit of the next class is $0.30$. $\text{Class Width} = 0.30 - 0.20 = 0.10$

2nd Class: $0.30 - 0.39$

The lower class limit of the next class is $0.40$. $\text{Class Width} = 0.40 - 0.30 = 0.10$

3rd Class: $0.40 - 0.49$

The lower class limit of the next class is $0.50$. $\text{Class Width} = 0.50 - 0.40 = 0.10$

4th Class: $0.50 - 0.59$

The lower class limit of the next class is $0.60$. $\text{Class Width} = 0.60 - 0.50 = 0.10$

5th Class: $0.60 - 0.69$

There is no next class, but we