Below is a sorted stem-and-leaf diagram for the measured speeds (miles per hour) of 49 randomly chosen vehicles on highway I-80 in Nebraska. The modal class is: stem unit $ =10 $
leaf unit $ =1 $
$\begin{array}{rrl}
\text { Frequency } & \text { Stem } & \text { Leaf } \
1 & 4 & 9 \
1 & 5 & 5 \
17 & 6 & 01222455556688999 \
19 & 7 & 0111233345666778999 \
7 & 8 & 0133557 \
4 & 9 & 0122 \
4 9&
\end{array}$
A)60 but less than 70.
B)70 but less than 80.
C)80 but less than 90.
D)impossible to determine.

Question

Below is a sorted stem-and-leaf diagram for the measured speeds (miles per hour) of 49 randomly chosen vehicles on highway I-80 in Nebraska. The modal class is: stem unit $ =10 $
leaf unit $ =1 $
$\begin{array}{rrl}
\text { Frequency } & \text { Stem  } & \text { Leaf } \
1 & 4 & 9 \
1 & 5 & 5 \
17 & 6 & 01222455556688999 \
19 & 7 & 0111233345666778999 \
7 & 8 & 0133557 \
4 & 9 & 0122 \
4 9&
\end{array}$
A)60 but less than 70.
B)70 but less than 80.
C)80 but less than 90.
D)impossible to determine.

Quizplus · Accepted Answer

The modal class is the class with the highest frequency. In this case, the class with speeds from 70 but less than 80 has the highest frequency of 19.

Below Is a Sorted Stem-And-Leaf Diagram for the Measured Speeds =10 =10 =10

Below Is a Sorted Stem-And-Leaf Diagram for the Measured Speeds $=10$