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. $$\begin{array} { l c }
\text { Time(inMinutes) } & \begin{array} { c }
\text { Relative } \
\text { Frequency }
\end{array} \
\hline 0 \text { but less than } 5 & 0.37 \
5 \text { but less than } 10 & 0.22 \
10 \text { but less than } 15 & 0.15 \
15 \text { but less than } 20 & 0.10 \
20 \text { but less than } 25 & 0.07 \
25 \text { but less than } 30 & 0.07 \
30 \text { or more } & 0.02
\end{array}$$
-Referring to Scenario 2-5, if 100 calls were randomly sampled, how many calls lasted 15 minutes or longer?

A)10
B)14
C)26
D)74

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. $$\begin{array} { l c } 
\text { Time(inMinutes) } & \begin{array} { c } 
\text { Relative } \
\text { Frequency }
\end{array} \
\hline 0 \text { but less than } 5 & 0.37 \
5 \text { but less than } 10 & 0.22 \
10 \text { but less than } 15 & 0.15 \
15 \text { but less than } 20 & 0.10 \
20 \text { but less than } 25 & 0.07 \
25 \text { but less than } 30 & 0.07 \
30 \text { or more } & 0.02
\end{array}$$
-Referring to Scenario 2-5, if 100 calls were randomly sampled, how many calls lasted 15 minutes or longer?

A)10 
B)14 
C)26 
D)74

Quizplus · Accepted Answer

The relative frequencies for calls lasting 15 minutes or longer are 0.10 (15-20 minutes), 0.07 (20-25 minutes), 0.07 (25-30 minutes), and 0.02 (30 or more minutes). Adding these gives 0.26. Therefore, 26 calls out of 100 lasted 15 minutes or longer.

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

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