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Complete this assessment to practice reading stem and leaf plots. Be sure to check your answers.

Practice: Reading Stem and Leaf Plots

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

    \begin{array}{|l|llllll}0 & & & & & & \\1 & & & & & & \\2 & 0 & 6 & 8 & 8 & 8 & \\3 & 0 & 2 & 6 & 6 & 7 & 8 \\4 & 1 & 2 & 6 & 6 & & \\5 & & & & & & \\6 & & & & & &\end{array}

    Key: 4 |1=414 lizards

    What was the smallest number of lizards at any one zoo?

  2. A zookeeper created the following stem-and-leaf plot showing the number of sloths at each major zoo in the country:

      \begin{array}{|l|llll}
0 & 3 & & &  \\
1 & 6 & 7 & 7 \\
2 & 0 & 4 &  &  &  & \\
3 & 0 & 1 & 1 & 2 & 4 & 7 & 9 & 9 \\
4 & 1 & 2 & 3 & 5 & 7
\end{array}

    Key: 4 |1=41 lizards

    How many zoos have exactly 17 sloths?

  3. A statistician for a chain of department stores created the following stem-and-leaf plot showing the number of pairs of glasses at each of the stores:

      \begin{array}{|l|llll} 0 & 9 & & & \\ 1 & 3 & 6 & 6 & 8\\ 2 & 1 & 2 & 3 & 5 & 6 & 9 \\ 3 & 0 & &  & & &&  \\ 4 & 1 & 2 & 3 & 3 & 5& 7 \end{array}

    Key: 4 | 1=41 pairs of glasses

    How many department stores have fewer than 38 pairs of glasses?

  4. The government published the following stem-and-leaf plot showing the number of bears at each major zoo in the country:

     \begin{array}{|l|lllll}
0 & & & & & & \\
1 & 8 & 8 & & \\
2 & 1 & 3 & 6 &6 &7&7&9 \\
3 & 1& 7 & & &  \\
4 & 1 & 4 & 5 & 7 & & \\
5 & 0 & 3 & &
\end{array}

    Key: 4 |1=414 bears

    How many zoos have more than 50 bears?

Source: Khan Academy, https://www.khanacademy.org/math/ap-statistics/quantitative-data-ap/histograms-stem-leaf/e/reading_stem_and_leaf_plots
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