Refer to Exercise 12.67.
a. Determine a model to relate the probability of proteinuria in a pregnant woman to social class and smoking level.
b. Predict the probability of proteinuria in a pregnant woman of social class I smok-ing less than 20 cigarettes per day.
c. Place a 95% confidence interval on the probability of proteinuria in a pregnant woman of social class I smoking less than 20 cigarettes per day.
In exercise

Signs of Toxemia Social Smoking Hypertension Proteinuria Both Hypertension Level None and Proteinuria Total 1.101 1 1