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.

   Luz sorts words written in a minute for writers into a stem-and-leaf plot (the paper rustled). How many writers wrote 20 words or more?

   11
3. 3.

   Milo sorts seconds to solve a puzzle for students into a stem-and-leaf plot (one piece hid under the couch). How many students needed 60 seconds or more?

   7
4. 4.

   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
5. 5.

   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
6. 6.

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

   29
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.

   Esme compares two classes' test scores and wants the median and the spread of each class at a glance. Which graph fits?

   • A histogram, because it groups the values into bars.
   • A dot plot, because it shows every value on a number line.
   • A bar graph, because it uses bars to show counts.
   • A box plot, because it shows the median and the spread.
9. 9.

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

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

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

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