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 2785 women, took daily multivitamins containing 0.8 mg of folic acid; the other group, consisting of 2106 women, received only trace elements. Major birth defects occurred in 32 cases when the women took folic acid and in 49 cases when the women did not. Construct a 95% confidence interval for the difference between the two population proportions, P1 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 95% confidence interval estimate is from to (Round to three decimal places as needed. Use ascending order.)
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 2785 women, took daily multivitamins containing 0.8 mg of folic acid; the other group, consisting of 2106 women, received only trace elements. Major birth defects occurred in 32 cases when the women took folic acid and in 49 cases when the women did not. Construct a 95% confidence interval for the difference between the two population proportions, P1 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 95% confidence interval estimate is from to (Round to three decimal places as needed. Use ascending order.)
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.5: Interpreting Data
Problem 1C
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What is the 95% confidence interval estimate ?
Transcribed Image Text: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 2785
women, took daily multivitamins containing 0.8 mg of folic acid; the other group, consisting of 2106 women, received
only trace elements. Major birth defects occurred in 32 cases when the women took folic acid and in 49 cases when
the women did not. Construct a 95% confidence interval for the difference between the two population proportions,
P1 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 95% confidence interval estimate is from to
(Round to three decimal places as needed. Use ascending order.)
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