TABLE 2-6
The following are the durations 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 2-6, if 100 calls were sampled, ________ of them would have lasted less than 5 minutes or at least 30 minutes or more.
A) 35
B) 37
C) 39
D) None of the above.

Question

TABLE 2-6
The following are the durations 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 2-6, if 100 calls were sampled, ________ of them would have lasted less than 5 minutes or at least 30 minutes or more.
A) 35 
B) 37 
C) 39 
D) None of the above.

Quizplus · Accepted Answer

To find the percentage of calls that lasted less than 5 minutes or at least 30 minutes or more, we need to add the number of calls that fall into those categories and divide by the total number of calls (100). 
From the table, we can see that there are 14 calls that lasted less than 5 minutes and 25 calls that lasted 30 minutes or more. 
Thus, the percentage of calls that lasted less than 5 minutes or at least 30 minutes or more is:
(14 + 25)/100 * 100% = 39%
Therefore, the answer is choice C (39).

TABLE 2-6 The Following Are the Durations in Minutes of a Sample