Brad Davenport, a consumer reporter for a national cable TV channel, is working on a story evaluating generic food products and comparing them to their brand-name counterparts. According to Brad, consumers claim to like the brand-name products better than the generics, but they can’t even tell which is which. To test his theory, Brad gives each of 200 consumers two potato chips—one generic, the other a brand name—and asks them which one is the brand-name chip. Fifty-five percent of the subjects correctly identify the brand-name chip. At the 0.025 level, is this significantly greater than the 50% that could be expected simply by chance? Determine and interpret the p-value for the test.
Answer to relevant QuestionsIt has been reported that 80% of taxpayers who are audited by the Internal Revenue Service end up paying more money in taxes. Assume that auditors are randomly assigned to cases, and that one of the ways the IRS oversees its ...What is a power curve and how is it applicable to hypothesis testing? Using assumed true population percentages of 2%, 3%, 4%, 5%, 6%, and 7%, plot the power curve for the test in Exercise 10.63. In exercise A simple random sample of 300 items is selected from a large shipment, and testing ...The average U.S. family includes 3.13 persons. To determine whether families in her city tend to be representative in size compared to those across the United States, a city council member selects a simple random sample of ...In a test of the effectiveness of a new battery design, 16 battery-powered music boxes are randomly provided with either the old design or the new version. Hours of playing time before battery failure were as ...
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