A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2959 occupants not wearing s

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answerhappygod
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A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2959 occupants not wearing s

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A simple random sample of front-seat occupants involved in carcrashes is obtained. Among 2959 occupants not wearing seat belts, 39 were killed. Among 7769 occupants wearing seat belts, 19 were killed. Use a 0.05 significance level to test the claim that seat belts are effectivein reducing fatalities. Complete parts (a) through (c) below.Question content area bottomPart 1a. Test the claim using a hypothesis test.Consider the first sample to be the sample of occupants not wearingseat belts and the second sample to be the sample of occupantswearing seat belts. What are the null and alternative hypothesesfor the hypothesis test?A.H0: p1≠p2H1: p1=p2B.H0: p1≥p2H1: p1≠p2C.H0: p1=p2H1: p1<p2D.H0: p1≤p2H1: p1≠p2E.H0: p1=p2H1: p1>p2F.H0: p1=p2H1: p1≠p2Part 2Identify the test statistic.z= enter your response here(Round to two decimal places as needed.)Part 3Identify the P-value.P-value= enter your response here(Round to three decimal places as needed.)Part 4What is the conclusion based on the hypothesis test?The P-value is ▼less thangreater thanthe significance level of α=0.05, so ▼rejectfail to rejectthe null hypothesis. There ▼is notissufficient evidence to support the claim that the fatality rate ishigher for those not wearing seat belts.Part 5b. Test the claim by constructing an appropriate confidenceinterval.The appropriate confidence interval is enter your response here<p1−p2< enter your responsehere.(Round to three decimal places as needed.) Part 6What is the conclusion based on the confidence interval?Because the confidence interval limits ▼includedo not include0, it appears that the two fatality rates are ▼equal.not equal.Because the confidence interval limits include ▼only negativepositive and negativeonly positivevalues, it appears that the fatality rate is ▼the samehigherlowerfor those not wearing seat belts.Part 7c. What do the results suggest about the effectiveness of seatbelts?A.The results suggest that the use of seat belts is associated withlower fatality rates than not using seat belts.B.The results suggest that the use of seat belts is associated withthe same fatality rates as not using seat belts.C.The results suggest that the use of seat belts is associated withhigher fatality rates than not using seat belts.D.The results are inconclusive.
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