Repeat Problem 7 assuming that you plan to use a model that contains age, smoking status during pregnancy and race. Consider the low-birth-weight study. What sample size would be needed in a new study...

Repeat Problem 7 assuming that you plan to use a model that contains age, smoking status during pregnancy and race.

Consider the low-birth-weight study. What sample size would be needed in a new study to be able to detect that the odds of a low-birth-weight baby decreases at a rate of 10% per 10 pound increase in weight at the last menstrual period, using a 5% type I error probability and 80% power?