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, if 100 calls were sampled, ________ of them would have lasted less than 15 minutes.
A) 26
B) 74
C) 10
D) None of the above

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, if 100 calls were sampled, ________ of them would have lasted less than 15 minutes.
A) 26 
B) 74 
C) 10 
D) None of the above

Quizplus · Accepted Answer

From Table 2-5, we see that 26 calls lasted less than 10 minutes, and 48 calls lasted between 10 and 14 minutes. This means that a total of 74 out of the 100 sampled calls lasted less than 15 minutes. Therefore, the answer is B - 74.

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