A study in the Annals of Emergency Medicine found that for emergency room patients in California hospitals the average waiting time— the elapsed time from arrival until seeing a physician— was 56 minutes (source: acep.org). As part of your research at St. Luke’s Hospital in Los Angeles, you track a random sample of 200 patients. The average waiting time for patients in the sample is 60.4 minutes. The sample standard deviation is 28.6 minutes. Is this sample result sufficient to reject a null hypothesis that the average waiting time for patients at St. Luke’s is the same as the overall California average? Use a 5% significance level.
Answer to relevant QuestionsRefer to Exercise 52. Suppose the sample size was 12 rather than 200. Revise the test you set up and report your decision. Assume the population distribution is approximately normal. In exercise A study in the Annals of ...A study by the National Institute on Media and the Family reported that American children, ages 2 17, spend, on average, 25 hours per week watching television (mediafamily.org). You believe that your community average is ...Stickle Soft Drinks plans to purchase advertising time on the Tuesday night “America Sings” television series, but only if it can be shown that the average age of the show’s viewers is less than 30. A random sample of ...Refer to Exercise 70. Suppose sample size was 50 days rather than 10 days. Show the proper hypothesis test and report your conclusion. In exercise Your friend Fred claims that his average gym workout time is at least 150 ...According to researchers at Carnegie Mellon University, the average life span of a computer hard drive is 600,000 hours, or 3.1 years (source: science. newsfactor.com). Suppose a particular company claims that the life span ...
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