SCENARIO 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 Scenario 2-5, what is the cumulative relative frequency for the percentage of calls
That lasted 10 minutes or more?
A) 0.16
B) 0.24
C) 0.41
D) 0.90

Question

SCENARIO 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 Scenario 2-5, what is the cumulative relative frequency for the percentage of calls
That lasted 10 minutes or more?
A) 0.16 
B) 0.24 
C) 0.41 
D) 0.90

Quizplus · Accepted Answer

The cumulative relative frequency for the percentage of calls that lasted 10 minutes or more is 0.41. This is because the cumulative relative frequency for the percentage of calls that lasted 9 minutes or less is 0.59, and the cumulative relative frequency for the percentage of calls that lasted 10 minutes or more is 1.00. Therefore, the cumulative relative frequency for the percentage of calls that lasted 10 minutes or more is 1.00 - 0.59 = 0.41.

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