For a one-tailed (upper tail) hypothesis test with a sample size of 26 and a .01 level of significance, the critical value of the test statistic t is
A) 2.797.
B) 2.787.
C) 2.485.
D) 2.479.

Question

Quizplus · Accepted Answer

For a one-tailed hypothesis test with a significance level of .01 and a sample size of 26, the degrees of freedom would be 25 (since degrees of freedom = sample size - 1). Looking up the critical value in a t-distribution table for 25 degrees of freedom at the .01 level for a one-tailed test, the closest value is 2.485.

For a One-Tailed (Upper Tail) Hypothesis Test with a Sample