A Simple Random Sample Of Front Seat Occupants Involved In Car Crashes Is Obtained Among 2895 Occupants Not Wearing Sea 1 (18.44 KiB) Viewed 86 times
A Simple Random Sample Of Front Seat Occupants Involved In Car Crashes Is Obtained Among 2895 Occupants Not Wearing Sea 2 (15.02 KiB) Viewed 86 times
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2895 occupants not wearing seat belts, 35 were killed. Among 7861 occupants wearing seat belts, 20 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 a. Test the claim using a hypothesis test Consider the first sample to be the sample of occupants not wearing seat belts and the second sample to be the sample of occupants wearing seat belts. What a OA H₂ DI SP₂ H₂=Px*P₂ OD. H₂: Dy "P₂ H₂1 P P₂ Identify the test statist O (Round to two decimal places as needed) Identity the P-value Pivalue= What is the conclusion based on the hypothesis teat? The value is the significance level of 0.05, so OB H₂ Py app H₁: Px P₂ OR HO P1 P₂ H₂! Dy #D₂ the nut hypothes. There the null and atemative hypotheses for the hypothesis test? OC. H₂P *P H₂ Dy "P OF PPP HyPy Py suficient evidence to support the claim that the fatality rate is higher for those not wearing seat be
b. Test the claim by constructing an appropriate confidence interval The appropriate confidence interval is (P₁₂) (Round to three decimal places as needed) What is the conclusion based on the confidence interval? 0, it appears that the two fatality rates are Because the confidence intervallits not wearing seat be c. What do the results suggest about the effectiveness of seat belta? Because the confidence interval limits include OA The results suggest that the use of seat belts is associated with lower fatality rates than not using seat belts OB. The results suggest that the use of seat belts is associated with the same tatality rates as 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 OD. The results are inconclusive. values, it appears that the fatality re Time Remaining:02:42:34 for those Next
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