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

Looking at the data in Table 2-5, we can see that there are 35 out of 100 calls that lasted less than 15 minutes. Therefore, the percentage of calls that lasted less than 15 minutes is (35/100) x 100% = 35%. Answer choice B (74) represents the percentage of calls that lasted 15 minutes or longer, which is 100% - 35% = 65%, so it is the correct answer.

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