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 midpoint of the last class is
A) 35.5
B) 34.
C) 35.
D) 34.5.

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 midpoint of the last class is
A) 35.5
B) 34.
C) 35.
D) 34.5.

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 midpoint of the last class is
A) 35.5
B) 34.
C) 35.
D) 34.5.