Table 5–15 cross-classifies pregnant women in a study by their body mass index (BMI) at 16 weeks gestation and whether they had a pre-term delivery. Body Mass Index and Preterm Delivery BMI

1. 
   Table 5–15
   cross-classifies pregnant women in a study by their body mass index (BMI) at 16 weeks gestation and whether they had a pre-term delivery.

                              Body Mass Index and Preterm Delivery

14. In the study described in Problem 13, suppose the mean BMI at 16 weeks gestation is 28.5 with a standard deviation of 3.6, and that BMI is assumed to follow a normal distribution. Find the following:

A. The proportion of women with a BMI greater than 30.

B. The proportion of women with a BMI greater than 40.

C. The BMI that separates the top 10% from the rest.