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.

   Ren compared heights in centimeters for two groups. No plant complained. The mean for the sun plants is how many MADs greater than the mean for the shade plants?

   4
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.

   Ari compared heights in inches for two groups. One leaned toward the camera. How long is the overlap of the two plots?

   8
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?

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

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