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5. The technology underlying hip replacements has changed as these operations have become more popular (over...

5. The technology underlying hip replacements has changed as these operations have become more popular (over 250,000 in the USA in 2008). Starting in 2003, highly durable ceramic hips were marketed. Unfortunately, for too many patients the increased durability has been counterbalanced by an increased incidence of squeaking. The May 11, 2008, issue of the New York Times reported that in one study of 143 individuals who received ceramic hips between 2003 and 2005, 10 of the hips developed squeaking. Perform a hypothesis test to determine if the proportion of patients with these hips that reported squeaking is different than 0.08.

a What hypotheses should be tested?

b What is the test statistic value?

c What is the p-value?

d Make a conclusion in terms of the problem.

Math   Statistics-And-Probability   
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