Find the expected sign of β 2 in each model.

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Chapter 12, Problem 193ACI

a.

To determine

Find the expected sign of β2 in each model.

b.

To determine

Check whether there is evidence that the quadratic model relating pain to funniness rating is useful or not.

b.

To determine

Check whether there is evidence that the quadratic model relating aggression/hostility to funniness rating is useful or not.

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