# Week 3 Learning TDistribution QA.docx - Question 1...

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Question 1Construct a 93% confidence interval for a sampling distribution having a mean of 150, standarddeviation of 20, and a size of 16.140.25 to 159.75141.25 to 158.777% to 93%139.34 to 160.66
Question 2Construct a 90% confidence interval for a sampling distribution having means of {4, 4, 4, 4.2,4.2, 4.3, 4.3, 4.3, 4.4, 4.4, 4.4, 4.4, 4.5, 4.5, 4.6, 4.7, 4.7, 4.7, 4.8, 4.8, 4.8, 4.9, 4.9, 4.9, 4.9}.10% to 90%
Question 3As the confidence level increases for the same sampling distribution, the confidence interval_____________.
Question 4Construct a 95% confidence interval for a sampling distribution having a mean of 150, standarddeviation of 20, and a size of 16.
Question 5What is the degree of freedom in a T-distribution?
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