Question: Determine the t-percentile that is required to construct each of the following two-sided confidence intervals: (a) Confidence level = 95%, degrees of freedom = 12

Determine the t-percentile that is required to construct each of the following two-sided confidence intervals:
(a) Confidence level = 95%, degrees of freedom = 12
(b) Confidence level = 95%, degrees of freedom = 24
(c) Confidence level = 99%, degrees of freedom = 13
(d) Confidence level = 99.9%, degrees of freedom = 15

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