# t-d.docx - Construct a 90% confidence interval for a...

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Construct a 90% confidence interval for a sampling distribution having a mean of 150, standard deviationof 20, and a size of 16.
140.25 to 159.75As the confidence level increases for the same sampling distribution, the confidence interval_____________.
What is the degree of freedom in a T-distribution?
Always zeroConstruct a 93% 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}.7% to 93%4.402 to 4.6064.391 to 4.6174.381 to 4.627Construct 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}.4.402 to 4.606
4.391 to 4.61710% to 90%4.381 to 4.627Construct a 93% confidence interval for a sampling distribution having a mean of 150, standard deviationof 20, and a size of 16.141.25 to 158.777% to 93%140.25 to 159.75139.34 to 160.66

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