# Comparing Groups

Warmup

Activity #1

`Compare Dot Plots from 2 Sets of Data.`

• Study the dot plots for the women’s and men’s volleyball teams and answer the questions..

(2.) Look at the following heights of team players: How much taller is the volleyball team than the gymnastics team?

• Gymnastics team’s heights (in inches) : 56, 59, 60, 62, 62, 63, 63, 63, 64, 64, 68, 69
• Volleyball team’s heights (in inches): 72, 75, 76, 76, 78, 79, 79, 80, 80, 81, 81, 81
• Make dot plots in the applet below to compare the heights of the tennis and badminton teams.
• Tennis team’s heights (in inches): 66, 67, 69, 70, 71, 73, 73, 74, 75, 75, 76
• Badminton team’s heights (in inches): 62, 62, 65, 66, 68, 71, 73

(3.) What do you notice about your dot plots?

(4.) Elena says the members of the tennis team were taller than the badminton team. Lin disagrees. Do you agree with either of them? Explain or show your reasoning.

Activity #2

`Compare Dot Plots from 2 Sets of Data.`

• Study the dot plots for the two families below and answer the questions..

Compare the heights of these two families. Explain or show your reasoning.

• The heights (in inches) of Noah’s family members: 28, 39, 41, 52, 63, 66, 71
• The heights (in inches) of Jada’s family members: 49, 60, 68, 70, 71, 73, 77

If Jada’s family adopts newborn twins who are each 18 inches tall, does this change your thinking? Explain your reasoning.

Challenge #1

Compare the weights of the backpacks for the students in these three classes.

Challenge #2

Quiz Time