Refer to Exhibit 2-1. The percentage of students working 19 hours or less 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 percentage of students working 19 hours or less is



a. 20%
b. 25%
c. 75%
d. 80%


Answer: b. 25%


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