Consider the snoring and heart disease data of Table 3.1 in Section 3.2.2.

With scores {0, 2, 4, 5} for snoring levels, the logistic regression ML fit is logit(πˆ ) = −3.866 + 0.397x.

a. Interpret the sign of the estimated effect of x.

b. Estimate the probabilities of heart disease at snoring levels 0 and 5.

c. Describe the estimated effect of snoring on the odds of heart disease.