online quiz 4 - City University of Hong Kong CB 2200

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Question 1 If an economist wishes to determine whether there is evidence that average family income in a community equals $25,000 a two-tailed test should be utilized an upper-tailed test should... be utilized either a one-tailed or two-tailed test could be used with equivalent results a lower-tailed test should be utilized Ans: A Question 2 The level of significance can be any value between -1.96 to 1.96 can be any positive value is (1 - confidence level) can be any value Ans: C Question 3 If the level of significance of a hypothesis test is raised from 0.01 to 0.05, the probability of a Type II error will increase will decrease will not change will also increase from 0.01 to 0.05 Ans: B Question 4 Suppose we want to test H0: LaTeX: \mu\geμ ≥ 30 versus H1: LaTeX: \muμ < 30. Which one of the following possible sample results based on a sample of size 36 is most likely to reject H0 in favor of H1? Sample mean = 26, sample standard deviation = 9 Sample mean = 32, sample standard deviation = 2 Sample mean = 27, sample standard deviation = 4 Sample mean = 28, sample standard deviation = 6 Ans: C Question 5 We have cr [Show More]

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