A Simple Random Sample Of Front Seat Occupants Involved In Car Crashes Is Obtained Among 2946 Occupants Not Wearing Sea 1 (30.82 KiB) Viewed 68 times
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2946 occupants not wearing seat belts, 39 were killed. Among 7879 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. P-value = 0.005 (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 α = 0.05, so reject C 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.) What is the conclusion based on the confidence interval? Because the confidence interval limits those not wearing seat belts. c. What do the results suggest about the effectiveness of seat belts? 0, it appears that the two fatality rates are Because the confidence interval limits include O A. The results suggest that the use of seat belts is associated with the same fatality rates as not using seat belts. O B. The results suggest that the use of seat belts is associated with lower fatality rates than not using seat belts. OC. The results suggest that the use of seat belts is associated with higher fatality rates than not using seat belts. O D. The results are inconclusive. values, it appears that the fatality rate is for
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