SOLUTION: The following table cross classifies pregnant women in the study by their body mass index (BMI) at 16 weeks gestation and whether they had preterm delivery. What is the probability

Question 1164453: The following table cross classifies pregnant women in the study by their body mass index (BMI) at 16 weeks gestation and whether they had preterm delivery. What is the probability of women with BMI less than 30 and delivers pre term?
BMI < 30 BMI 30-34.9 BMI 35+
Preterm 320 80 120
Fullterm 4700 480 300

A) 0.0867
B) 0.2857
C) 0.0533
D) 0.533

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!

Preterm 320 80 120 -------520
Fullterm 4700 480 300 ---5480
Total----5020--560--420--6000
that is the 320 cell and the total number is 6000
the probability is 320/6000=0.0533
C
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