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Find the critical t - value that corresponds to 95% confidnence. Assume 16 degrees of freedom.
How do I go about solving this question?
If the confidence interval around the mean is 95%, you
have two tails that are each 2.5%.
Find the t-value with a right tail tail of 2.5% when df = 15.
I use a TI-84 calculator to get:
invT(0.975,15) = 2.1315