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.

   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
3. 3.

   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
4. 4.

   Pia draws the histogram of plant heights in centimeters (the plants grew). Now the bars are made 4 wide. How tall is the new bar from 14 up to 18?

   26
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.

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

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

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

   • A box plot, because it shows the median and the spread of the heights, grouped by tens
   • A stem-and-leaf plot, because it keeps every value and groups them by tens.
   • A histogram, because it groups the values into bars.
   • A bar graph, because it uses bars to show counts.
10. 10.

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

    • A box plot, because it shows the median and the spread.
    • 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 bar graph, because it uses bars to show counts.