Q1) How many tissues must a package of tissues contain? Researchers have found out that a person uses average of 45 tissues during a cold. Assume a random sample of 1500 people yielded following data on the number of tissues utilized during cold: xbar=32, s=17. We wish to test alternative hypothesis Ha: μ < 45. Mention the correct rejection region for α = 0.05
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Student Response
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Value
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Correct Answer
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Feedback
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A.
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Reject Ho if z> 1.96 or z < -1.96.
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B.
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Reject Ho if z < -1.96.
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C.
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Reject Ho if z > 1.645.
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D.
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Reject Ho if z < -1.645.
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Score: 0/6
Q2) We have created a 95% confidence interval for μ with result (9, 14). What conclusion will we make if we test Ho: µ=18 vs Ha: µ≠18 at α=0.05.
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Student Response
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Value
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Correct Answer
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Feedback
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A.
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Accept Ho rather than Ha
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B.
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Fail to reject Ho
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C.
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We cannot tell what our decision will be with the information given.
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D.
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Reject Ho in favor of Ha
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Score: 0/6
Q3) A sample of 9 measurements, randomly selected from normally distributed population, resulted in following summary statistics: xbar = 5.3 , s = 1.1.
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Student Response
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Value
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Correct Answer
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Answer:
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not answered
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0%
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2.73
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Score: 0/11
Compute the appropriate Test Statistic to test null hypothesis that mean of population is 4.3 against alternative hypothesis μ ≠ 4.3.