Questions 15 to 17: Random samples from two age groups of brides (200 brides under 18 years and 100 brides at least twenty years old) showed that 50% of brides in the under 18 group were divorced after 15 years, while 40% of brides in the 20 or older age group were divorced after 15 years.

1.What is a 95% confidence interval for the difference between the population proportions of brides who are divorced within 15 years (brides under 18 - brides at least 20)? (Stats.blue, Confidence Interval Comparing Two Proportions)

2.What is a 99% confidence interval for the difference between the population proportions of brides who are divorced within 15 years (brides under 18 - brides at least 20)?

3.Using either confidence interval that you found as evidence to support your claim, explain whether there is a difference in the divorce rate for these two age groups. (Is zero in the confidence interval?)