K For several years, evidence had been mounting that folic acid reduces major birth defects. In a study, doctors enrolled women prior to conception and divided them randomly into two groups. One group, consisting of 2727 women, took daily multivitamins containing 0.8 mg of folic acid; the other group, consisting of 2076 women, received only trace elements. Major birth defects occurred in 31 cases when the women took folic acid and in 50 cases when the women did not. Construct a 90% confidence interval for the difference between the two population proportions, P - P2- Click here to view page 1 of the table of areas under the standard normal curve. Click here to view page 2 of the table of areas under the standard normal curve. The 90% confidence interval estimate is from to (Round to three decimal places as needed. Use ascending order.)