Exercise 21 lists the observed frequencies of leading digits from amounts on checks from seven suspect companies. Here are the observed frequencies of the leading digits from the amounts on checks written by the author: 68, 40, 18, 19, 8, 20, 6, 9, 12. (Those observed frequencies correspond to the leading digits of 1, 2, 3, 4, 5, 6, 7, 8, and 9, respectively.) Using a 0.05 significance level, test the claim that these leading digits are from a population of leading digits that conform to Benford’s law. Do the author’s check amounts appear to be legitimate?
Answer to relevant QuestionsFrequencies of leading digits from IRS tax files are 152, 89, 63, 48, 39, 40, 28, 25, and 27. Using a 0.05 significance level, test for goodness-of-fit with Benford’s law. Does it appear that the tax entries are ...Is the hypothesis test in Exercise 1 right-tailed, left-tailed, or two-tailed? Explain your choice. The table below shows results since 2006 of challenged referee calls in the U.S. Open. Use a 0.05 significance level to test the claim that the gender of the tennis player is independent of whether the call is overturned. Lipitor is the trade name of the drug atorvastatin, which is used to reduce cholesterol in patients. Adverse reactions have been studied in clinical trials, and the table below summarizes results for infections in patients ...Winning-team data were collected for teams in different sports, with the results given in the accompanying table. Use a 0.05 level of significance to test the claim that home/visitor wins are independent of the sport.
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