A political pollster surveyed a random sample of 500 registered voters, asking whether they intended to vote for candidate A or candidate B. She found that 54% preferred candidate A. Using a 95% confidence interval, determine whether the pollster is justified in predicting that candidate A will win the election.
Answer to relevant QuestionsThe days many parents are having children far later in life than the generation of parents before them. A researcher interested in whether teenagers can relate well to older parents interviewed 120 high school students with ...With the sample mean in Problem 8, find (a) The 95% confidence interval and (b) The 99% confidence interval. In Problem 8 A social psychologist was interested in gender difference in the sociability of teenagers. Using the number of good friends as a measure, he compared the sociability of eight female and seven male teenagers. Test the null ...A computer company conducted a “new and improved” course designed to train its service representatives in learning to repair personal computers. Twenty trainees were split into two groups on a random basis: 10 took the ...A national polling organization conducts a telephone survey of American adults concerning whether they believe the president is doing a good job. A total of 990 persons surveyed had voted in the previous presidential ...
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