TABLE 2-5
The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier.
-Referring to Table 2-5, what is the width of each class?
A) 1 minute
B) 5 minutes
C) 2%
D) 100%

Question

TABLE 2-5
The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier. 
-Referring to Table 2-5, what is the width of each class?
A) 1 minute 
B) 5 minutes 
C) 2% 
D) 100%

Quizplus · Accepted Answer

To determine the width of each class, we can subtract the lower class limit from the upper class limit. For example, the first class interval is 0-4, so the width is 4-0=4. We can repeat this calculation for each class interval and see that the width is consistently 5 minutes. Therefore, the correct choice is B) 5 minutes.

TABLE 2-5 The Following Are the Duration in Minutes of a Sample