How much do two dot plots overlap?

Answer Key - Grade 7 Math Worksheet - Building Confidence

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

1. 1.

   Kira compared lengths in centimeters for two groups. A squirrel watched closely. The mean for the oak leaves is how many MADs greater than the mean for the maple leaves?

   2
2. 2.

   Esme compared minutes of reading for two groups. The bookmark stayed put. The mean for the Tuesday group is how many MADs greater than the mean for the Thursday group?

   2.5
3. 3.

   Noah compared free throws made out of 40 for two groups. The nets were not harmed. The mean for the Elm campers is how many MADs greater than the mean for the Oak campers?

   2
4. 4.

   Luz compared jump rope jumps in 30 seconds for two groups. One rope tangled itself. How long is the overlap of the two plots?

   6
5. 5.

   Tala compared minutes for each ride for two groups. The bus stayed on time. How long is the overlap of the two plots?

   4
6. 6.

   Jun compared minutes each kite stayed up for two groups. A gust showed off. How long is the overlap of the two plots?

   6
7. 7.

   Pia compared two pairs of groups. No plant complained. Which pair's plots overlap more?

   • The pairs overlap the same, because each pair has the same number of dots.
   • Pair 2 overlaps more, because its means are closer in centimeters.
   • Pair 1 overlaps more, because its means are fewer MADs apart.
   • Pair 2 overlaps more, because its means are more MADs apart.
8. 8.

   Bo compared two pairs of groups. One rope tangled itself. Which pair's plots overlap more?

   • Pair 1 overlaps more, because its means are closer in jumps.
   • Pair 2 overlaps more, because its means are fewer MADs apart.
   • The pairs overlap the same, because each pair has the same number of dots.
   • Pair 1 overlaps more, because its means are more MADs apart.
9. 9.

   Milo compared two pairs of groups. A gust showed off. Which pair's plots overlap more?

   • Pair 2 overlaps more, because its means are more MADs apart.
   • Pair 1 overlaps more, because its means are fewer MADs apart.
   • The pairs overlap the same, because each pair has the same number of dots.
   • Pair 2 overlaps more, because its means are closer in minutes.

10. Read this first

    Use this

    Two pairs of dot plots of minutes of piano practice a day, each pair on its own number line. Pair 1, beginners and intermediates: the means are 9 minutes apart and each plot has a MAD of 1.5 minutes, so the means are 6 MADs apart. Pair 2, intermediates and advanced players: the means are 15 minutes apart and each plot has a MAD of 5 minutes, so the means are 3 MADs apart.

11. 10.

    Zee compared two pairs of groups. The piano stayed in tune. Which pair's plots overlap more?

    • Pair 1 overlaps more, because its means are more MADs apart.
    • Pair 2 overlaps more, because its means are fewer MADs apart.
    • The pairs overlap the same, because each pair has the same number of dots.
    • Pair 1 overlaps more, because its means are closer in minutes.