Grade 7 · Math

7th grade How much do two dot plots overlap? worksheet

6 printable versionsBuilding Confidence10 questions · answer keyFree · no account

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How much do two dot plots overlap?

Grade 7 Math Worksheet - Building Confidence

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

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?
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?
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?
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?
Ari compared heights in inches for two groups. One leaned toward the camera. How long is the overlap of the two plots?
Luz compared jump rope jumps in 30 seconds for two groups. One rope tangled itself. How long is the overlap of the two plots?
Tala compared minutes for each ride for two groups. The bus stayed on time. How long is the overlap of the two plots?
Jun compared minutes each kite stayed up for two groups. A gust showed off. How long is the overlap of the two plots?
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 1 overlaps more, because its means are fewer MADs apart.
- 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.
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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.
10.
Zee compared two pairs of groups. The piano stayed in tune. Which pair's plots overlap more?
- 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.
- Pair 1 overlaps more, because its means are more MADs apart.
- Pair 2 overlaps more, because its means are fewer MADs apart.

7th grade How much do two dot plots overlap? worksheet – printable — Print: 1 2 3 4 5 6

About this worksheet

How much do two dot plots overlap. Every version has 10 questions, and the answer key prints on the second page.

What your child will learn

I can say how many MADs (or IQRs) apart two centers are: the gap ÷ the spread.
I can find the stretch where two plots overlap and count the dots in it.
I can say which of two pairs of plots overlap more, and why a bigger gap in raw units does not mean less overlap.

Standard: 7.SP.B.3

Words to know

overlap: The stretch of the number line covered by both plots.

MAD: Mean absolute deviation: the mean of how far each dot is from the plot's mean.

IQR: Q3 − Q1: how long the middle half of the dots is.

times the spread: How many MADs (or IQRs) fit in the gap between two centers.

center: A typical value: the mean (balance point) or the median (middle dot).

random sample: Some members picked by chance, so they stand for the whole group.

tend to: Usually, for the group as a whole, not for every single one.

Common mistakes

Your child gave the difference between the two centers without counting it in units of spread.

Your child multiplied the gap by the MAD.

Your child divided the MAD by the gap.

What to say

Ask: how many MADs (or IQRs) fit in that difference?

Ask: is the number of MADs in a gap bigger or smaller than the gap itself?

Ask: which number goes on top when you count how many MADs fit in the gap?

Questions parents ask

What is the most common mistake with how much do two dot plots overlap??

Your child gave the difference between the two centers without counting it in units of spread.

How can I help my child with how much do two dot plots overlap??

Ask: how many MADs (or IQRs) fit in that difference?

Are these 7th grade math worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

More grade 7 math

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