During 2008, college work-study students earned a mean of $1478. Assume that a sample consisting of 45 of the work-study students at a large university was found to have earned a mean of $1503 during that year, with a standard deviation of $210. Would a one-tail test at the 0.05 level suggest the average earnings of this university’s work-study students were significantly higher than the national mean?
Answer to relevant QuestionsAccording to the Federal Reserve Board, the mean net worth of U.S. households headed by persons 75 years or older is $640,000. Suppose a simple random sample of 50 households in this age group is obtained from a certain ...The U.S. Census Bureau says the 52-question “long form” received by 1 in 6 households during the 2000 census takes a mean of 38 minutes to complete. Suppose a simple random sample of 35 persons is given the form, and ...For a simple random sample, n = 1000 and p = 0.47. At the 0.05 level, test H0: π ≥ 0.50 versus H1: π < 0.50. According to the National Association of Home Builders, 55% of new single-family homes built during 2005 had a fireplace. Suppose a nationwide homebuilder has claimed that its homes are “a cross section of America,” but ...Using the sample results in Exercise 10.76, construct and interpret the 90% confidence interval for the population proportion. Is the hypothesized proportion (0.41) within the interval? Given the presence or absence of the ...
Post your question