Exhibit 2-1
The numbers of hours worked (per week) by 400 statistics students are shown below.
-Refer to Exhibit 2-1. The class width for this distribution
A)is 9
B)is 10
C)is 39, which is: the largest value minus the smallest value or 39 - 0 = 39
D)varies from class to class

Question

Exhibit 2-1
The numbers of hours worked (per week) by 400 statistics students are shown below. 
-Refer to Exhibit 2-1. The class width for this distribution
A)is 9 
B)is 10 
C)is 39, which is: the largest value minus the smallest value or 39 - 0 = 39 
D)varies from class to class

Quizplus · Accepted Answer

To determine the class width, we need to find the range of the data (largest value minus smallest value) and divide it by the number of classes. Since the range is 39 and there are 4 classes, the class width is 39/4 = 9.75, which rounds to 10. Therefore, the best choice is B) is 10.

Exhibit 2-1 The Numbers of Hours Worked (Per Week) by 400 Statistics