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Creating a Stem-and-Leaf Plot for Baseball Home Run Data

In this activity, we will create a stem-and-leaf plot using data on the number of home runs hit by the 20 baseball players with the best single-season batting averages in Major League Baseball since 1900. The given home run values will be organized into stems and leaves to visualize the distribution of the data. By following structured steps, we will separate the data into stems and leaves, sort the leaves in increasing order, and interpret the distribution.

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Creating a Stem-and-Leaf Plot for Baseball Home Run Data

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  1. EXAMPLE 1 Make a stem-and-leaf plot Baseball The number of home runs hit by the 20 baseball players with the best single-season batting averages in Major League Baseball since 1900 are listed below. Make a stem-and-leaf plot of the data. 14, 25, 8, 8, 7, 7, 19, 37, 39, 18, 42, 23, 4, 32, 14, 21, 3, 12, 19, 41

  2. EXAMPLE 1 Make a stem-and-leaf plot SOLUTION Separate the data into stems and leaves. STEP1: Home Runs

  3. EXAMPLE 1 Make a stem-and-leaf plot Write the leaves in increasing order STEP2: Home Runs

  4. 1. U.S. HISTORY for Example 1 GUIDED PRACTICE The years in which each of the first 20 states were admitted to the Union are listed below. Make a stem-and-leaf plot of the years. 1788, 1787, 1788, 1816, 1792, 1812, 1788, 1788, 1817, 1788, 1787, 1788, 1789, 1803, 1787, 1790, 1788, 1796, 1791, 1788

  5. Stem Leaves 178 7 7 7 8 8 8 8 8 8 8 8 9 179 0 1 2 6 180 3 181 2 6 7 Key: 178 | 8 = Year 1788 for Example 1 GUIDED PRACTICE ANSWER Years

  6. 2. REASONING ANSWER The data are clustered from 3–19. Over half of the values are from 3–19. for Example 1 GUIDED PRACTICE In Example 1, describe the distribution of the data on the intervals represented by the stems. Are the data clustered together in a noticeable way? Explain.

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