Refer to Exhibit 2-1. The cumulative percent frequency for the class of 30 - 39 is

Exhibit 2-1

The number of hours worked (per week) by 400 statistics students are shown below.

Number of Hours Frequency
0 - 9 20
10 - 19 80
20 - 29 200
30 - 39 100



Refer to Exhibit 2-1. The cumulative percent frequency for the class of 30 - 39 is


a. 100%
b. 75%
c. 50%
d. 25%


Answer: a. 100%


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