A newspaper reports that the governor’s approval rating stands at 65%. The article adds that the poll is based on a random sample of 972 adults and has a margin of error of 2.5%. What level of confidence did the pollsters use?
Answer to relevant QuestionsThe Board of Directors of a publicly traded company says that a proposed amendment to their bylaws is likely to win approval in the upcoming election because a poll of 1505 stock owners indicated that 52% would vote in ...For each of the following situations, write the null and alternative hypotheses in terms of parameter values. Example: We want to know if the proportion of up days in the stock market is 50%. Answer: Let p = the proportion ...As in Exercise 1, for each of the following situations, write the null and alternative hypotheses in terms of parameter values. a) A recent UMass-Amherst study found that seat-belt compliance in Massachusetts was 73% in ...In the 1980s, it was generally believed that congenital abnormalities affected about 5 % of the nation’s children. Some people believe that the increase in the number of chemicals in the environment has led to an increase ...A magazine called WebZine is considering the launch of an online edition. The magazine plans to go ahead only if it’s convinced that more than 25% of current readers would subscribe. The magazine contacts a simple random ...
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