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. How many vehicles were traveling exactly the speed limit (70 mph)? stem unit $ =10 $
leaf unit $ =1 $
$\begin{array}{rrl}
\text { Frequency } & \text { Stem Leaf } \
1 & 4 & 9 \
1 & 5 & 5 \
17 & 6 & 01222455556688999 \
19 & 7 & 0111233345666778999 \
7 & 8 & 0133557 \
\underline{4} & 9 & 0122 \
49 &
\end{array}$
A)0
B)1
C)19
D)Impossible to tell

Question

Quizplus · Accepted Answer

Looking at the stem-and-leaf diagram, we see that there is only one vehicle with a speed of exactly 70 mph, which is represented by the entry 7 0 in the diagram. Therefore, the answer is choice B.

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 $=10$