20. Alzheimers. Testing for Alzheimers disease can be
Chapter 21, Problem 20(choose chapter or problem)
20. Alzheimers. Testing for Alzheimers disease can be along and expensive process, consisting of lengthy testsand medical diagnosis. Recently, a group of researchers(Solomon et al., 1998) devised a 7-minute test to serve as aquick screen for the disease for use in the general populationof senior citizens. A patient who tested positivewould then go through the more expensive battery oftests and medical diagnosis. The authors reported a falsepositive rate of 4% and a false negative rate of 8%.a) Put this in the context of a hypothesis test. What arethe null and alternative hypotheses?b) What would a Type I error mean?c) What would a Type II error mean?d) Which is worse here, a Type I or Type II error? Explain.e) What is the power of this test?
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