Problem 27E

A data set consists of 83 observations. How many classes would you recommend for a frequency distribution?

Solution 27E

Step1 of 2:

From the given problem we have total number of observations = 83.

We need to find the classes for a frequency distribution.

Step2 of 2:

We have totally 83 observations, by using 2 to the power ‘k’ rule.

The 25 = 32, which is less than 83, so 5 classes are not enough.

Take the 26 = 64, which is less than 83, so 6 classes are not enough.

Take the 27 = 128, which is greater than 83.

Hence, I will recommend 7 classes.