Teacher resources and professional development across the curriculum

Teacher professional development and classroom resources across the curriculum

Solutions for Session 7, Part B

See solutions for Problems: B1 | B2 | B3

Problem B1

 a. Yes. Of the 12 people with below-average arm spans, 10 have below-average heights. b. Yes. Of the 12 people with above-average arm spans, 11 have above-average heights. c. These answers suggest a positive association between arm span and height.

Problem B2

 a. Yes. Of the 11 people with below-average heights, 10 have below-average arm spans. b. Yes. Of the 13 people with above-average heights, 11 have above-average arm spans.

 Problem B3 Here are the completed tables: Row proportions: Row percentages: Since 90.9% of the people with below-average heights also have below-average arm spans, and 84.6% of the people with above-average heights also have above-average arm spans, this again indicates a strong positive association between height and arm span.