Question: (3) Multivariate relationships. Agresti & Finlay p. 315, problem 10.6(5 points) Explain what it means to control for a variable; use an example to illustrate.

(3)Multivariate relationships.Agresti & Finlay p. 315, problem 10.6(5 points)

Explain what it means to control for a variable; use an example to illustrate.

(4)Spurious correlation.Agresti & Finlay p. 315, problem 10.8 (5 points)

Figure 9.17 on page 285 of Chapter 9 showed a negative correlation between birth rate and television ownership. Identify a variable to help explain how this association could be spurious.

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