A researcher is using a two-tailed hypothesis test with α = .05 to evaluate the effect of a treatment.If the boundaries for the critical region are t = ± 2.080,then how many individuals are in the sample?
A)n = 22
B)n = 21
C)n = 20
D)Impossible to determine without more information

Question

Quizplus · Accepted Answer

The critical value of t for a two-tailed test with α = .05 and df = 20 is ± 2.080. Therefore, the sample size must be 21.

A Researcher Is Using a Two-Tailed Hypothesis Test with α