Twelve first-time heart attack victims were given a test that measures internal anger. The following data relates their scores and whether they had a second heart attack within 5 years.

(a) Explain how the relationship between a second heart attack and one’s anger score can be analyzed via a logistics regression model.

(b) Use appropriate software to estimate the parameters for this model.

(c) Estimate the probability that a heart attack victim with an anger score of 55 will have a second attack within 5 years.

Anger Score Second Heart Attack 80 77 yes yes 70 68 yes 64 no