(a) Find the t-value such that the area in the right tail is 0.02 with 30 degrees of freedom.
(Round to three decimal places as needed.)
(b) Find the t-value such that the area in the right tail is 0.025 with 30 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 0.05 with 24 degrees of freedom. [Hint: Use symmetry.]
(Round to three decimal places as needed.)
(d) Find the critical t-value that corresponds to 99% confidence. Assume 21 degrees of freedom.
(Round to three decimal places as needed.)

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