Histograms, and which graph fits the data

Answer Key - Grade 7 Math Worksheet

Circle the best answer, or write your answer on the line.

1. 1.

   Kira sorts seconds of jump rope without a miss for students into a stem-and-leaf plot (the rope hummed). How many students jumped for 40 seconds or more?

   10
2. 2.

   Noah draws the histogram of minutes of reading (the book club met). Now the bars are made 10 wide. How tall is the new bar from 0 up to 10?

   13
3. 3.

   Ren draws the histogram of points scored in a season (the scoreboard flickered). Now the bars are made 30 wide. How tall is the new bar from 50 up to 80?

   21
4. 4.

   Tala draws the histogram of miles biked in a week (the bell rang). Now the bars are made 15 wide. How tall is the new bar from 5 up to 20?

   36
5. 5.

   Zee sorts minutes of piano practice for students into a stem-and-leaf plot (the piano stayed in tune). What is the median?

   29
6. 6.

   Ari sorts minutes of reading in a night for students into a stem-and-leaf plot (the lamp stayed on). What is the median?

   44
7. 7.

   Bo sorts seconds to build a block tower for students into a stem-and-leaf plot (the tower wobbled). What is the median?

   37
8. 8.

   Jun has 24 heights in inches and wants to keep every value but group them by tens. Which graph fits?

   • A stem-and-leaf plot, because it keeps every value and groups them by tens.
   • A box plot, because it shows the median and the spread of the heights, grouped by tens
   • A bar graph, because it uses bars to show counts.
   • A histogram, because it groups the values into bars.
9. 9.

   Kira has 70 sleep times and wants to see whether most are bunched up or spread evenly. Which graph fits?

   • A histogram, because it groups many values into bars to show the shape.
   • A dot plot, because it shows every value, so the shape is easy to see
   • A box plot, because it shows the median and the spread.
   • A bar graph, because it uses bars to show counts.
10. 10.

    Milo measured how high 12 balloons floated and wants to see each height and which are close together. Which graph fits?

    • A box plot, because it shows the median and the spread of the heights
    • A histogram, because it groups the values into bars.
    • A bar graph, because it uses bars to show counts.
    • A dot plot, because it shows every value on a number line.