Reconsider the data from the previous study about the effect of specialized prenatal care for women with gestational diabetes. Do the data provide evidence of a relationship between the type of prenatal care a woman with gestational diabetes receives and whether or not she has an LGA baby?
a. Calculate the observed value of the relative risk of having an LGA baby for the pregnant women who received usual prenatal care compared to those who received specialized prenatal care.
b. Suppose that you were to calculate a 95% confidence interval for the long-run relative risk of having an LGA baby for pregnant women who will receive usual prenatal care compared to those who will receive specialized prenatal care. Will the number 1 lie within this interval? Explain your reasoning.