Question

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 medical malpractice 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 selected from an online group involved with ears. There were 1343 surveys returned. Use a 0.01 significance level to test the claim that the return rate is less than​ 20%. Use the​ P-value method and use the normal distribution as an approximation to the binomial distribution.

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

Answer 1