The numbers of hours worked (per week) by 400 statistics students are shown below. $$\begin{array} { l l }
\text { Number of hours } & \text { Frequency } \
0 - 9 & 20 \
10 - 19 & 80 \
20 - 29 & 200 \
30 - 39 & 100
\end{array}$$ The cumulative percent frequency for students working less than 20 hours per week is
A) 20%.
B) 25%.
C) 80%.
D) 100%.

Question

The numbers of hours worked (per week) by 400 statistics students are shown below. $$\begin{array} { l l } 
\text { Number of hours } & \text { Frequency } \
0 - 9 & 20 \
10 - 19 & 80 \
20 - 29 & 200 \
30 - 39 & 100
\end{array}$$   The cumulative percent frequency for students working less than 20 hours per week is
A) 20%.
B) 25%.
C) 80%.
D) 100%.

Quizplus · Accepted Answer

The Answer of The numbers of hours worked (per week) by 400 statistics students are shown below. $$\begin{array} { l l } 
\text { Number of hours } & \text { Frequency } \
0 - 9 & 20 \
10 - 19 & 80 \
20 - 29 & 200 \
30 - 39 & 100
\end{array}$$   The cumulative percent frequency for students working less than 20 hours per week is
A) 20%.
B) 25%.
C) 80%.
D) 100%.