In 2004, New York Attorney General Eliot Spitzer filed a lawsuit against GlaxoSmithKline pharmaceutical company, claiming that the company failed to publish results of one of their studies that showed that an antidepressant drug (Paxil) may make adolescents more likely to commit suicide. Partly as a consequence, editors of 11 medical journals agreed to a new policy to make researchers and companies register all clinical trials when they begin, so that negative results cannot later be covered up. The International Journal of Medical Journal Editors wrote, “Unfortunately, selective reporting of trials does occur, and it distorts the body of evidence available for clinical decision-making.” Explain why this controversy relates to the argument that it is misleading to report results only if they are “statistically significant.”
Answer to relevant QuestionsRefer to Example 12. Using a tree diagram, given that H0 is rejected, approximate P(Type I error) under the assumption that a true effect exists 20% of the time and that there’s a 30% chance of a Type II error. For testing H0: p = 1 / 3 (astrologers randomly guessing) against Ha: p > 1 / 3 with n = 116, Example 13 showed that P(Type II error) = 0.02 when p = 0.50. Now suppose that p = 0.35. Recall that P(Type I error) = 0.05. a. ...California’s governor election in 2010 had two major candidates, Brown and Whitman. a. For a random sample of 650 voters in one exit poll, 360 voted for Brown and 240 for Whitman. Conduct all five steps of a test of H0: p ...Refer to the previous exercise. a. Explain what Type I and Type II errors mean in the context of that exercise. b. If you made an error with the decision in part d, is it a Type I or a Type II error? Management claims that the mean income for all senior-level assembly-line workers in a large company equals $500 per week. An employee decides to test this claim, believing that it is actually less than $500. For a random ...
Post your question