It is more difficult to reject H₀
A) with a one-tailed test.
B) with a two-tailed test.
C) with α = .05 rather than .01.
D) with α = .01 rather than .001.

Question

Quizplus · Accepted Answer

A two-tailed test is more difficult to reject the null hypothesis (H₀) because the significance level (α) is split between two tails of the distribution, requiring a more extreme test statistic to fall into either critical region compared to a one-tailed test where all of the α is in one tail.

It Is More Difficult to Reject H₀