In a sample of 50 births, a term birth was recorded as 32 weeks or more of gestation, and a preterm birth as less than 32 weeks. We will use these data to compare the proportion of Caesarean deliveries for term and preterm births. a. Of the 50 births, 29 were term and 21 were preterm; 41 were Caesarean deliveries and the other 9 were vaginal. Using this information, do you have enough information to complete this table? If so, fill in the table; if not, what other information do you need?

b. Of the 29 term births, 22 were Caesarean deliveries; of the 21 pre-term births, 19 were Caesarean. Use this information and that from part (a) to complete this table

 

c. What are the observed conditional proportions of Caesarean deliveries for each group of births? 

d. What is the relative risk of having a Caesarean delivery for a pre-term birth compared to a term birth? 

e. Is there evidence that compared to a term birth, a preterm birth is more likely to be Caesarean than vaginal? Use the relative risk calculated in part (d) to help you decide.

Transcribed Image Text:

Caesarean Vaginal Total Preterm Term Total