According to a Kelton Research survey, the average U.S. woman owns 15 pairs of shoes. Under the assumption that this finding was based on the sample data in file XR09041, construct and interpret the 95% confidence interval for the population mean number of pairs of shoes owned by U.S. women. Based on this confidence interval, would it seem very unusual if another sample of this size were to result in a sample mean of 13.2 pairs of shoes?
Answer to relevant QuestionsA pharmaceutical company found that 46% of 1000 U.S. adults surveyed knew neither their blood pressure nor their cholesterol level. Assuming the persons surveyed to be a simple random sample of U.S. adults, construct a 95% ...A study by Careerbuilder.com found that 20% of companies check out job candidates’ profiles on social networking sites like Facebook and MySpace before deciding whether to employ them. Assuming that the survey included a ...Estelle McCarthy, a candidate for state office in New Jersey, has been advised that she must get at least 65% of the union vote in her state. A recent political poll of likely voters included 800 union-member respondents, ...Suppose that Nabisco would like to determine, with 95% confidence and a maximum likely error of 0.03, the proportion of first graders in Pennsylvania who had Nabisco’s Spoon-Size Shredded Wheat for breakfast at least once ...A simple random sample is to be drawn from a population of 2000. The population standard deviation has been estimated as being 40 grams. In order to have 99% confidence that the sampling error in estimating μ is no more ...
Post your question