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.

Critical Value

A threshold value used in hypothesis testing that defines the boundary between the region where the null hypothesis is rejected and the region where it is not rejected.

Test Statistic

A value calculated from sample data during hypothesis testing used to decide whether to reject the null hypothesis.