A simple random sample of front-seat occupants involved in car crashes was obtained. Among 7,000 occupants not wearing seat belts, 18were killed. Among 7765 occupants wearing seat belts, 16 were killed. Use a 0.01 significance level to test the claim that seat belts are effective in reducing fatalities using the critical value approach. a) Define parameters and state null and alternative hypothesis. b)Test statistics c) P-value d) Conclusion

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.