Data and Line Plots Quiz

Grade 4 · Math · Quiz

Test your understanding of line plots, data analysis, and interpreting graphs.

Questions

  1. A class measured the length of their crayons to the nearest half inch. The results were: 3, 3.5, 3.5, 3.5, 4, 4, 4.5. How many crayons were measured?

    1. 5
    2. 6
    3. 7
    4. 8
    Show answer

    Answer: 7

    Count all X marks: 1 + 2 + 1 + 2 + 1 = 7 crayons total.

  2. Using the data set: 2, 4, 4, 5, 5, 5, 7, what is the range?

    1. 3
    2. 4
    3. 5
    4. 7
    Show answer

    Answer: 5

    Range = greatest − least = 7 − 2 = 5.

  3. A line plot shows X marks above these values: 1/4 (1 X), 1/2 (2 X's), 3/4 (3 X's), 1 (2 X's). What is the mode?

    1. 1/4
    2. 1/2
    3. 3/4
    4. 1
    Show answer

    Answer: 3/4

    3/4 has the most X marks (3), so it is the mode — the value that occurs most often.

  4. A line plot has X marks above: 5 (three times), 6 (once), 7 (twice). How many total data points are there?

    Show answer

    Answer: 6

    Count all X marks: 3 + 1 + 2 = 6 total data points.

  5. Students recorded how many books they read: 1, 1, 2, 2, 2, 3, 4, 4. What is the mode?

    1. 1
    2. 2
    3. 3
    4. 4
    Show answer

    Answer: 2

    The value 2 appears 3 times, which is more than any other value. So 2 is the mode.

  6. The range tells you which value appears most often in a data set.

    Show answer

    Answer: False

    The range tells you how spread out the data is (greatest − least). The mode tells you which value appears most often.

  7. A line plot shows bug lengths in inches: 1/4, 1/4, 1/2, 1/2, 1/2, 3/4. What is the total combined length of all the bugs?

    1. 2 inches
    2. 2 1/4 inches
    3. 2 3/4 inches
    4. 3 inches
    Show answer

    Answer: 2 3/4 inches

    Total: 1/4 + 1/4 + 1/2 + 1/2 + 1/2 + 3/4 = 2/4 + 3/2 + 3/4 = 2/4 + 6/4 + 3/4 = 11/4 = 2 3/4 inches.

  8. Which statement describes a 'gap' in a line plot?

    1. A value that appears many times
    2. A value with no data points
    3. The space between two X marks on the same value
    4. The total of all values
    Show answer

    Answer: A value with no data points

    A gap on a line plot is a value on the number line that has no X marks above it — meaning no data points have that value.

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