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group A
group B
cold lasts less than a week
37% ( )
cold lasts a week or more
3. FInally, the researchers notice that, among the participants in group A, 48% had colds that lasted less than one week. Among the participants in group B, how many had colds that lasted a week or more? Complete the table with the corresponding percentages.
Student Response
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Activity Synthesis
The goal is to make sure students know how to create and interpret di erent two-way relative frequency tables from the same two-way table. Ask the students identi ed as writing down the totals for the two-way table, “Why did you write down the totals for the two-way table?” (I wrote them down because I knew we would need them to calculate relative frequencies.) Talk about
group A
group B
cold lasts less than a week
48% ( )
cold lasts a week or more
group A
group B
cold lasts less than a week
14%
24%
cold lasts a week or more
15%
47%
group A
group B
cold lasts less than a week
37%
63%
cold lasts a week or more
24%
76%
group A
group B
cold lasts less than a week
48%
34%
cold lasts a week or more
52%
66%
Unit 3 Lesson 2: Relative Frequency Tables 23
