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(6 pts) Suppose we obtained data on vein size after application of a nitroglycerin ointment in a sample of 50 patients. The mean vein size

(6 pts) Suppose we obtained data on vein size after application of a nitroglycerin ointment in a sample of 50 patients. The mean vein size is found to be 7.8mm with an SD of 2.1.

Using the t distribution, what is the 95% confidence interval?

b) Using the t distribution, what is the 99% confidence interval?

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