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In a study of 794 randomly selected medical malpractice​ lawsuits, it was found that 517 of...

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In a study of 794 randomly selected medical malpractice​lawsuits, it was found that 517 of them were dropped or dismissed.Use a 0.01 significance level to test the claim that most medicalmalpractice lawsuits are dropped or dismissed.

In a study of cell phone usage and brain hemispheric​ dominance,an Internet survey was​ e-mailed to 6993 subjects randomly selectedfrom an online group involved with ears. There were 1343 surveysreturned. Use a 0.01 significance level to test the claim that thereturn rate is less than​ 20%. Use the​ P-value method and use thenormal distribution as an approximation to the binomialdistribution.

Consider a drug testing company that provides a test formarijuana usage. Among 319 tested​ subjects, results from 27subjects were wrong​ (either a false positive or a false​negative). Use a 0.05 significance level to test the claim thatless than 10 percent of the test results are wrong.

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