The NCAA Men’s Division I Basketball Championship is held each spring and features 65 college basketball teams. This 20-day tournament is colloquially known as “March Madness.” A Harris Poll asked 2435 randomly selected U.S. adults whether they would participate in an office pool for March Madness; 317 said they would. Use these data to find and interpret a 95% confidence interval for the percentage of U.S. adults who would participate in an office pool for March Madness.
Answer to relevant QuestionsIn a Harris Poll of 1961 randomly selected U.S. adults, 1137 said that they do not believe that abstinence programs are effective in reducing or preventing AIDS. At the 5% significance level, do the data provide sufficient ...Fill in the blanks. a. The mean of all possible sample proportions is equal to the_______. b. For large samples, the possible sample proportions have approximately a distribution. c. A rule of thumb for using a normal ...Use Exercises 12.99 and 12.100 to show that the chisquare homogeneity test for comparing two population proportions and the two-tailed two-proportions z-test are equivalent. According to the U.S. Census Bureau publication Demographic Profiles, a relative-frequency distribution of the U.S. resident population by region in 2000 was as follows. A simple random sample of this year's U.S. residents ...According to market research by Brittain Associates, published in an issue of American Demographics, the income distribution of adult Internet users closely mirrors that of credit card applicants. That is exactly what many ...
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