The formula used to calculate a confidence interval for the mean of a normal population whennis small is the following.

The formula used to calculate a confidence interval for the mean of a normal population when n is small is the following. x + (t critical value) S What is the appropriate t critical value for each of the following confidence levels and sample sizes? (Round your answers to two decimal places.) (a) 95% confidence, n = 17 (b) 90% confidence, n = 13 (c) 99% confidence, n = 24 (d) 90% confidence, n = 25 (e) 80% confidence, n = 13 (f) 95% confidence, n = 9