A researcher is conducting an experiment to evaluate a treatment that is expected to increase the scores for individuals in a population.If the researcher uses a one-tailed test with a = .01,then which of the following correctly identifies the critical region? A)z 2.33 B)z 2.58 C)z

Question

A researcher is conducting an experiment to evaluate a treatment that is expected to increase the scores for individuals in a population.If the researcher uses a one-tailed test with a = .01,then which of the following correctly identifies the critical region? A)z > 2.33 B)z > 2.58 C)z < 2.33 D)z < 2.58

Quizplus · Accepted Answer

For a one-tailed test with alpha (α) = .01, the critical region is in the tail of the distribution where the z-score is greater than the critical value. The critical value for α = .01 in a one-tailed test is approximately 2.33, indicating that scores must be greater than this value to be considered statistically significant in the direction predicted by the hypothesis.

A Researcher Is Conducting an Experiment to Evaluate a Treatment