According to Zagat’s latest edition, the average cost for a dinner at better restaurants in the US is $ 35.37. In a survey of 36 randomly selected local restaurants, you find the average cost for a dinner is $ 32.80. Is this sample result sufficient to make the case that the local average is less than Zagat’s national average of $35.37? Use a significance level of 5% and assume the local population standard deviation is $ 6.60. Report the p value for this sample result and explain what it means.
Answer to relevant QuestionsComstock Resources, a Texas oil and gas exploration company, reports that the average cost of drilling a well is $ 1.65 million (source: news. corporate. findlaw.com). Crowder Drilling claims that its new technology will ...The competing hypotheses for a hypothesis test that might have been conducted circa 1491 are as follows: H0 : The earth is flat. Ha: The earth is round. a. Describe what a Type I error would be here. b. Describe what a ...The National Center for Educational Statistics (NCES) reports that the average score for 12th graders who took the national reading test was 295 (on a scale of 1 to 500) (source: nces.ed.gov). A random sample of 100 12 th ...Suppose you are testing the following hypotheses: H0: μ < 1500 Ha: μ > 1500 Sample size is 25. The sample mean is 1545 and the sample standard deviation is 75. The significance level is .05. Assume that the values in the ...Refer 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 ...
Post your question