# Question

For each value of d.f. look up the value of Student's t in Appendix D for the stated level of confidence. How close is the t-value to the corresponding z-value (at the bottom of the column for d.f. = ∞) ?

a. d.f. = 40, 95 percent confidence

b. d.f. = 80, 95 percent confidence

c. d.f. = 100, 95 percent confidence

a. d.f. = 40, 95 percent confidence

b. d.f. = 80, 95 percent confidence

c. d.f. = 100, 95 percent confidence

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