Chapter 3.1, Problem 2E

a.

To determine

To find: The explanatory and the response variable.

Explanation of Solution

Given:

The provided variables are arm span and height of 50 teenagers.

Here, the explanatory variable is the height and the response variable is the arm span. Because the arm span of a teenager gets affected by the height.

b.

To determine

To find: The explanatory and response variable.

Explanation of Solution

Given:

The provided variables are, “the rain’s amount in the growing season and the yield of corn in bushels per acre”.

Here, the explanatory variable is the amount of rain and the response variable is the yield of corn. Because the yield of corn depends on the amount of rain