A simple random sample offront-seat occupants involved in car crashes is obtained. Among 2954 occupants not wearing seatbelts, 36 were killed. Among 7707 occupants wearing seatbelts, 12 were killed. Use a 0.05 significance level to test the claim that seat belts are effective in reducing fatalities. find the null and alternative hypothesis, test statistic, p value, conclusion, confidence interval , and confidence interval conclusion.