In recent years the average time it takes audit teams from Trimble and Martin to complete a company audit has been 55.8 hours. In monitoring the performance of one of these audit teams recently, reviewers found that the average time for a random sample of team audits differed by nearly 6 hours from the company average. If you were to use the sample average in a hypothesis test to determine if this team’s average performance is different from the overall company average, what null and alternative hypotheses would you recommend?
Answer to relevant QuestionsThe competing hypotheses for a hypothesis test are as follows: H0: There is no heaven or hell. Ha: There is a heaven and hell. a. Describe what a Type I error would be here. b. Describe what a Type II error would be here. ...Suppose you are testing the following hypotheses: H0: μ = 650 Ha: μ ≠ 650 Sample size is 100. The sample mean is 635. The population standard deviation is 140. The significance level is .10. a. Compute the sample ...The Internal Revenue Service (IRS) reports that the average refund for tax filers last year was $ 2236. The IRS believes that this year’s average refund will be the same as last year’s average. The average refund in a ...Refer to Exercise 48. Suppose the sample size was 25 rather than 250. Assume the population distribution is approximately normal. Revise the test you set up and report your decision. A severe tornado recently touched down in Bryce County, Kansas. Government policy calls for emergency support if the average damage done to the population of all farms in the county exceeds $ 20,000. At the moment, the ...
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