1. The data on the following page were taken from a study investigating the associations between spontaneous abortion and various risk factors

a.    For each level of alcohol consumption, using Stata, estimate the probability that a woman who becomes pregnant will undergo a spontaneous abortion.

b.      For each category of alcohol use, estimate the relative odds of experiencing a spontaneous abortion for women who consume some amount of alcohol versus those who do not consume any.

c.      In each case, calculate a 95% confidence interval for the odds ratio.

d.      What do you conclude?