Suppose that an emergency room doctor is interested in the relationship among gender, age, and sensitivity to pain among adult patients. She collects from a sample of 57 hospital files information on patients’ self-reported pain scores, ranging from 0 for no discomfort to 10 for the worst pain imaginable, along with the patients’ ages in years and gender (1 for male and 0 for female). The results of her regression analysis predicting pain based on age and gender are shown in the following table:

a. Interpret the constant (Y-intercept).
b. Interpret the regression coefficients for age and gender.
c. Indicate which, if either, of these two variables is a significant predictor of pain score.

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Variable b Age Gender Constant 1.321 SE t 0.239 5.527 0.065 0.041 1.585 0.857 0.665 1.289 Sig. 0.000 0.119 0.203