Determine the t-value in each of the cases.
Click the icon to view the table of areas under the t-distribution.
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(a) Find the t-value such that the area in the right tail is 0.05 with 25 degrees of freedom.
(Round to three decimal places as needed.)
(b) Find the t-value such that the area in the right tail is 0.005 with 12 degrees of freedom.
(Round to three decimal places as needed.)
(c) Find the t-value such that the area left of the t-value is 0.25 with 10 degrees of freedom. [Hint: Use symmetry.]
(Round to three decimal places as needed.)
(d) Find the critical t-value that corresponds to 80% confidence. Assume 29 degrees of freedom.
(Round to three decimal places as needed.)
