Reading Stem and Leaf Plot Exercises

1. The government published the following stem-and-leaf plot showing the number of sloths at each major zoo in the country:
   
   $\left\lvert\, \begin{array}{l|lllllllll} 0 & 3 & & & & & & & \\ 1 & 6 & 7 & 7 & & & & & \\ 2 & 0 & 4 & & & & & & \\ 3 & 0 & 1 & 1 & 2 & 4 & 7 & 9 & 9 \\ 4 & 1 & 2 & 3 & 5 & 7 & & & \end{array}\right.$
   
   

   Key: $4|1 = 41$ sloths

   How many zoos have fewer than 18 sloths?

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

   $\left\lvert\, \begin{array}{l|lllllllll} 0 \\ 1 \\ 2 & 0 & 6 & 8 & 8 & 8 \\ 3 & 0 & 2 & 6 & 6 & 7 & 8 \\ 4 & 1 & 2 & 6 & 6 & & & \\5 \\ 6 \end{array}\right.$

   Key: $4|0 = 20$ lizards

   How many zoos have fewer than 18 lizards?

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

   $\left\lvert\, \begin{array}{l|lllllllll} 0 \\ 1 & 8 & 8 & &\\ 2 & 1 & 3 & 6 & 6 & 6 & 7 & 7 & 9 \\ 3 & 1 & 7 \\ 4 & 1 & 4 & 5 & 7 \\5 & 0 & 3 \end{array}\right.$

   Key: $4|1 = 41$ bears

   How many zoos have fewer than 16 bears?

4. The government published the following stem-and-leaf plot showing the number of sloths at each major zoo in the country:
   
   $\left\lvert\, \begin{array}{l|lllllllll} 0 & 3 & & & & & & & \\ 1 & 6 & 7 & 7 & & & & & \\ 2 & 0 & 4 & & & & & & \\ 3 & 0 & 1 & 1 & 2 & 4 & 7 & 9 & 9 \\ 4 & 1 & 2 & 3 & 5 & 7 & & & \end{array}\right.$
   
   

   Key: $4|1 = 41$ sloths

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

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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