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9.9 Inference Procedures to Compare Two Population Proportions: Independent Sampling

In 2007, researchers looked at 15,024 deaths of US citizens overseas. In the study, it was found that 13% of those deaths were injury related. In the same year 121,599 deaths in the US mainland were due to injuries out of a total of 2,423,995 deaths. At the 2.5% significance level test the claim that the proportion of deaths of US citizens living in the mainland due to injury is less than the proportion of injury related deaths of US citizens abroad.


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