Stem and leaf plots review

A stem and leaf plot displays numerical data by splitting each data point into a "leaf" (usually the last digit) and a "stem" (the leading digit or digits).

For example, the buyer for a chain of department stores counted the number of pairs of boots at each of the stores and made a stem and leaf plot for the data. Here is the dataset and the stem and leaf plot:

Dataset: $17$‍, $18$‍, $20$‍, $25$‍, $28$‍, $34$‍, $34$‍, $37$‍, $38$‍, $50$‍

Stem and leaf plot:

$\begin{array}{rl}& 1|78\\ & 2|058\\ & 3|4478\\ & 4|\\ & 5|0\end{array}$‍
Key: $1|8$‍ represents a store that had $18$‍ pairs of boots.

Here's how to make a stem and leaf plot step by step. We'll use the same dataset as before. Here it is again:

$17$‍, $18$‍, $20$‍, $25$‍, $28$‍, $34$‍, $34$‍, $37$‍, $38$‍, $50$‍

Step 1: Split each data point into a stem and a leaf. The stem is everything before the final digit, and the leaf is the final digit. Write the stems in a vertical column and don't skip stems just because they don't have any data.

$1|7$‍, $1|8$‍, $2|0$‍, $2|5$‍, $2|8$‍, $3|4$‍, $3|4$‍, $3|7$‍, $3|8$‍, $5|0$‍

Our $\text{stems}$‍ are the tens digits:

$\begin{array}{rl}& 1|\\ & 2|\\ & 3|\\ & 4|\\ & 5|\end{array}$‍
Step 2: Write each leaf next to its corresponding stem. The $\text{leaves}$‍ should go from smallest to largest. Our leaves are the ones digits.

$1|7$‍, $1|8$‍, $2|0$‍, $2|5$‍, $2|8$‍, $3|4$‍, $3|4$‍, $3|7$‍, $3|8$‍, $5|0$‍

$\begin{array}{rl}& 1|78\\ & 2|058\\ & 3|4478\\ & 4|\\ & 5|0\end{array}$‍
Step 3: Give a key that explains what a stem and leaf represent.

$\begin{array}{rl}& 1|78\\ & 2|058\\ & 3|4478\\ & 4|\\ & 5|0\end{array}$‍
Key: $1|8$‍ represents a store that had $18$‍ pairs of boots.

A zookeeper published the following stem-and-leaf plot showing the number of bears at each major zoo in the country:

$\begin{array}{rl}& 0|\\ & 1|88\\ & 2|1366779\\ & 3|17\\ & 4|1457\\ & 5|03\end{array}$‍
Key: $1|8$‍ represents a zoo that has $18$‍ bears.