Suppose that a random sample of nine measurements from a normally distributed population gives a sample mean of 2.57 and a sample standard deviation of .3. Use critical values to test H0: μ = 3 versus Ha: μ ≠ 3 using levels of significance α = .10, α = .05, α = .01, and α = .001.
Answer to relevant QuestionsConsider the e- billing case. The mean and the standard deviation of the sample of 65 payment times are 18.1077 and 3.9612, respectively. (1) Test H0: μ < 19.5 versus Ha: μ < 19.5 by setting a equal to .01 and using a ...Recall that “very satisfied” customers give the XYZ-Box video game system a rating that is at least 42. Suppose that the manufacturer of the XYZ-Box wishes to use the 65 satisfaction ratings to provide evidence ...Last year, television station WXYZ’s share of the 11 P. M. news audience was approximately equal to, but no greater than, 25 percent. The station’s management believes that the current audience share is higher than last ...Again consider the Consolidated Power waste water situation. Remember that the power plant will be shut down and corrective action will be taken on the cooling system if the null hypothesis H0: μ ≤ 60 is rejected in favor ...In Exercise 9.54, test H0: σ = .2 versus Ha: σ > .2 at levels of significance .05 and .01. In exercise A manufacturer of coffee vending machines has designed a new, less expensive machine. The current machine is known to ...
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