A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2827 occupants not wearing seat belts, 39 were killed. Among 7811 occupants wearing seat belts, 17 were killed. Use a 0.05 significance level to test the claim that seat belts are effective in reducing fatalities. Complete parts (a) through (c) below. H1: P1 # P2 H1:Pq # P2 H1: P1 = P2 D. Ho: P1 = P2 H1: P1 P2 Identify the test statistic. Z= 7.32 (Round to two decimal places as needed.) Identify the P-value. P-value = 0 (Round to three decimal places as needed.) What is the conclusion based on the hypothesis test? The P-value is less than the significance level of a = 0.05, so reject the null hypothesis. There is sufficient evidence to support the claim that the fatality rate is higher for those not wearing seat belts. b. Test the claim by constructing an appropriate confidence interval. The appropriate confidence interval is < (P1 - P2) < (Round to three decimal places as needed.)

A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2827 occupants not wearing seat belts, 39 were killed. Among 7811 occupants wearing seat belts, 17 were killed. Use a 0.05 significance level to test the claim that seat belts are effective in reducing fatalities. Complete parts (a) through (c) below. H1: P1 # P2 H1:Pq # P2 H1: P1 = P2 D. Ho: P1 = P2 H1: P1 P2 Identify the test statistic. Z= 7.32 (Round to two decimal places as needed.) Identify the P-value. P-value = 0 (Round to three decimal places as needed.) What is the conclusion based on the hypothesis test? The P-value is less than the significance level of a = 0.05, so reject the null hypothesis. There is sufficient evidence to support the claim that the fatality rate is higher for those not wearing seat belts. b. Test the claim by constructing an appropriate confidence interval. The appropriate confidence interval is < (P1 - P2) < (Round to three decimal places as needed.)

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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