Researchers at an insurance company want to study the risk factors associated with heart disease, so they collect data from 240 people. As their dependent variable, they use a question that asks respondents if they have been hospitalized for heart problems (0 = no, 1 = yes). They also collect information on the respondents’ sex (0 = female, 1 = male), weight (in pounds), tobacco use (packs of cigarettes per week), and exercise (hours per week). Their analysis produces the following logistic regression table:

a. Why did they use logistic regression instead of multiple regression?
b. Interpret the results for each of the five variables, paying special attention to eb and statistical significance.

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Constant Sex Weight Tobacco b -23.499 4.523 0.143 -0.495 Exercise -0.132 SE Wald Sig. 10.699 4.824 0.028 2.552 3.142 0.076 0.061 5.524 0.019 0.316 2.448 0.118 0.175 0.576 0.448 0.000 92.149 1.154 0.610 0.876