Data Session 7: Solutions

A B C D
Homework

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.

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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.

<< back to Problem B2

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.

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Session 7 | Notes | Solutions | Video