14 Question 19 0/1 pt 3 19 Details 99 The logistic growth function f(t) = ---- models the percentage, P(x) of Americans 1 + 299e<sup>-0.138x</sup> who are x years old with some coronary heart disease. Use the function to solve the following. a. What percentage of 23 -year-olds have some coronary heart disease? (two decimal places) percent b. What percentage of 70 -year-olds have some coronary heart disease? (two decimal places) percent c. At what age is the percentage of some coronary heart disease 46%? (nearest year) years old Submit Question Question 20 0/1 pt 3 19 Details
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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% 82.36% 7.27% 1.54% 4.67%
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