Question

While working with doctors on heart attack patients, we want to predict whether the patient will have a second heart attack within 1 year (yes = 1), based on two predictor variables: whether the patient completed an anger-control treatment course (yes=1), and the patient's score on a trait anxiety scale (a higher score means more anxious).   Data on 20 patients is used to fit the following logistic regression:

Predictor	Coef	SE Coef	Z	P
Constant	-6.36347	3.21390	-1.98	0.048
AngerTrt	-1.02411	1.17108	-0.87	0.382
Anxiety	0.119045	0.0549790	2.17	0.030

What probability of second heart attack does the equation predict for someone who has taken the anger treatment course and whose anxiety level is 75?

56.83%

1.54%

7.27%

82.36%

Answer 1

from given data:

predicted  probability of second heart attack =-6.36347-1.02411*1+0.119045*75 = 1.54%