Exhibit 2-1
The numbers of hours worked (per week)by 400 statistics students are shown below.

-Refer to Exhibit 2-1.The number of students who work 19 hours or less is
A)80
B)100
C)200
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.The number of students who work 19 hours or less is
A)80 
B)100 
C)200 
D)400

Quizplus · Accepted Answer

Counting the number of students who work 19 hours or less, we can see that the data goes up to 19 and includes all numbers below it. Therefore, we add the frequencies from 0 to 19, which results in 100 students.

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