Testinar Grade 7 math

Stem-and-Leaf Plots

Students will build Grade 7 mastery of stem-and-leaf plots using models, equations, and test-style reasoning.

CH08-05 Statistics
Name
Date
Score
____ / 8
Directions Solve each problem. Show your reasoning on the page or on separate paper. Check the answer key only after finishing.

  1. A stem-and-leaf plot has stem \(3\) with leaves \(2, 5, 7, 8\). Which values does this represent?

    1. \(23, 35, 37, 38\)
    2. \(32, 35, 37, 38\)
    3. \(2, 5, 7, 8\)
    4. \(3.2, 3.5, 3.7, 3.8\)

  2. The stem-and-leaf plot below shows test scores. What is the minimum score?

    Stem-and-Leaf Plots visual for G7-C08-T05-Q002
    1. \(42\)
    2. \(41\)
    3. \(40\)
    4. \(48\)

  3. The stem-and-leaf plot below shows test scores. What is the maximum score?

    Stem-and-Leaf Plots visual for G7-C08-T05-Q003
    1. \(76\)
    2. \(77\)
    3. \(79\)
    4. \(86\)

  4. The stem-and-leaf plot shows heights (in cm) of students: How many students are represented?

    Stem-and-Leaf Plots visual for G7-C08-T05-Q004
    1. \(8\)
    2. \(11\)
    3. \(12\)
    4. \(14\)

  5. A stem-and-leaf plot has stems \(5, 6, 7\) with leaves: What is the range of the data?

    1. Stem \(5\): \(1, 4, 7\)
    2. Stem \(6\): \(0, 3, 8\)
    3. Stem \(7\): \(2, 6, 9\)

  6. The stem-and-leaf plot shows: How many data values fall between \(30\) and \(40\) (inclusive)?

    Stem-and-Leaf Plots visual for G7-C08-T05-Q006
    1. \(2\)
    2. \(3\)
    3. \(4\)
    4. \(5\)

  7. In a stem-and-leaf plot, the stem represents the tens digit and leaves represent the ones digit. If a value is \(67\), what stem and leaf should be written?

    1. Stem \(6\), Leaf \(7\)
    2. Stem \(7\), Leaf \(6\)
    3. Stem \(60\), Leaf \(7\)
    4. Stem \(67\), Leaf \(1\)

  8. A data set has values: \(12, 15, 15, 18, 21, 23, 24, 28\). Which is the correct stem-and-leaf plot?

    1. Stem \(1\): \(2, 5, 5, 8\); Stem \(2\): \(1, 3, 4, 8\)
    2. Stem \(1\): \(1, 2, 5, 5\); Stem \(2\): \(1, 3, 4, 8\)
    3. Stem \(1\): \(2, 5, 5, 8\); Stem \(2\): \(3, 4, 8, 1\)
    4. Stem \(1\): \(1, 2, 3, 4\); Stem \(2\): \(1, 5, 5, 8\)
Teacher and parent reference

Answer key and explanations

  1. B. \(32, 35, 37, 38\)

    Each leaf combines with its stem: stem \(3\) + leaf \(2\) = \(32\), stem \(3\) + leaf \(5\) = \(35\), etc.

  2. A. \(42\)

    The smallest stem is \(4\) with the smallest leaf \(2\), giving \(42\).

  3. A. \(76\)

    The largest stem is \(7\) with the largest leaf \(6\), giving \(76\).

  4. C. \(12\)

    Count all leaves: \(3 + 4 + 3 + 2 = 12\) data points.

  5. B. Stem \(6\): \(0, 3, 8\)

    Minimum is \(51\), maximum is \(76\). Range \(= 76 - 51 = 25\).

  6. C. \(4\)

    Values in the range: \(31, 34, 34, 37\) (all from stem \(3\)) \(= 4\) values.

  7. A. Stem \(6\), Leaf \(7\)

    The tens digit (\(6\)) is the stem; the ones digit (\(7\)) is the leaf.

  8. A. Stem \(1\): \(2, 5, 5, 8\); Stem \(2\): \(1, 3, 4, 8\)

    Leaves must be listed in order and correspond to the tens digit (stem).

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