Exhibit 2-1
The numbers of hours worked (per week) by 400 statistics students are shown below.
-Refer to Exhibit 2-1. If a cumulative frequency distribution is developed for the above data, the last class will have a cumulative frequency of
A)100
B)1
C)30 - 39
D)400

Question

Exhibit 2-1
The numbers of hours worked (per week) by 400 statistics students are shown below. 
-Refer to Exhibit 2-1. If a cumulative frequency distribution is developed for the above data, the last class will have a cumulative frequency of
A)100 
B)1 
C)30 - 39 
D)400

Quizplus · Accepted Answer

The last class in a cumulative frequency distribution will always include all of the data points, so the cumulative frequency for the last class will be equal to the total sample size, which is 400 in this case. Therefore, the correct answer is D: 400.

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