Lesson 2
Using Dot Plots to Answer Statistical Questions
Problem 1
Three sets of data about ten sixth-grade students were used to make three dot plots. The person who made these dot plots forgot to label them. Match each dot plot with the appropriate label.
![Three dot plots labeled A, B, C.](https://staging-cms-im.s3.amazonaws.com/Ct786eNdxfHcEyfifaaCMhR6?response-content-disposition=inline%3B%20filename%3D%226.8.B.PP.Image.11smush.png%22%3B%20filename%2A%3DUTF-8%27%276.8.B.PP.Image.11smush.png&response-content-type=image%2Fpng&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAXQCCIHWF37H2AMFB%2F20240722%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20240722T150738Z&X-Amz-Expires=604800&X-Amz-SignedHeaders=host&X-Amz-Signature=1c81e9d510fcf4d8cd384d8d6e4c9a60e9c02dcf242407ac82fcd1a301c307a2)
Solution
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Problem 2
The dot plots show the time it takes to get to school for ten sixth-grade students from the United States, Canada, Australia, New Zealand, and South Africa.
![Five dot plots.](https://staging-cms-im.s3.amazonaws.com/4y8FAw1BMz8ReDpZDyEXm6b8?response-content-disposition=inline%3B%20filename%3D%226-6.8.D.PP.Image.09.png%22%3B%20filename%2A%3DUTF-8%27%276-6.8.D.PP.Image.09.png&response-content-type=image%2Fpng&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAXQCCIHWF37H2AMFB%2F20240722%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20240722T150738Z&X-Amz-Expires=604800&X-Amz-SignedHeaders=host&X-Amz-Signature=f2ee365e98f26c8253167ed142e13d37f4d33af3e01b3b0f664e2b3771c4157e)
- List the countries in order of typical travel times, from shortest to longest.
- List the countries in order of variability in travel times, from the least variability to the greatest.
Solution
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Problem 3
Twenty-five students were asked to rate—on a scale of 0 to 10—how important it is to reduce pollution. A rating of 0 means “not at all important” and a rating of 10 means “very important.” Here is a dot plot of their responses.
![A dot plot, importance of reducing pollution, 2 to 10 by ones. Beginning with 2, the number of dots above each increment is 1, 1, 1, 2, 2, 2, 5, 5, 6.](https://staging-cms-im.s3.amazonaws.com/naPj9s7FFWsGRzJCB9HLCigZ?response-content-disposition=inline%3B%20filename%3D%226-6.8.B.PP.Image.10.png%22%3B%20filename%2A%3DUTF-8%27%276-6.8.B.PP.Image.10.png&response-content-type=image%2Fpng&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAXQCCIHWF37H2AMFB%2F20240722%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20240722T150738Z&X-Amz-Expires=604800&X-Amz-SignedHeaders=host&X-Amz-Signature=02dd4a35d66912c0b817a47c235a4a929ba404854245d57218a1f4a3059373b1)
Explain why a rating of 6 is not a good description of the center of this data set.
Solution
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