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1. A simple random sample of front seat occupants involved in car crashes is obtained. Among...

1. A simple random sample of front seat occupants involved in car crashes is obtained. Among 2823 occupants not wearing seat belts, 31 were killed. Among 7765 occupants wearing seat belts, 16 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.

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