Determine the t-value in each of the cases.

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Question content area bottomPart 1

(a) Find the t-value such that the area in the right tail is

0.25 with

5 degrees of freedom.

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(Round to three decimal places as needed.)

Part 2

(b) Find the t-value such that the area in the right tail is

0.025 with

10 degrees of freedom.

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(Round to three decimal places as needed.)

Part 3

(c) Find the t-value such that the area left of the t-value is

0.20 with

9 degrees of freedom. [Hint: Use symmetry.]

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(Round to three decimal places as needed.)

Part 4

(d) Find the critical t-value that corresponds to

70% confidence. Assume

27 degrees of freedom.

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(Round to three decimal places as needed.)