A simple random sample of front-seat occupants involved in car crashes is obtained. Among 3000 occupants not wearing seat belts, 25 were killed. Among 6650 occupants wearing seat belts, 27 were killed. Does the data provide evidence to conclude that seat belts are effective in avoiding fatalities? Perform a hypothesis test at the 5% significance level. 1)Define the parameters and state null and alternative hypotheses. 2)Test Statistics 3)P-Value Approach 4) Conclusion

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A simple random sample of front-seat occupants involved in car crashes is obtained. Among 3000 occupants not wearing seat belts, 25 were killed. Among 6650 occupants wearing seat belts, 27 were killed. Does the data provide evidence to conclude that seat belts are effective in avoiding fatalities? Perform a hypothesis test at the 5% significance level.

1)Define the parameters and state null and alternative hypotheses.

2)Test Statistics

3)P-Value Approach

4) Conclusion 

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