A researcher conducts a hypothesis test to evaluate the effect of a treatment.The hypothesis test produces a z-score of z = 2.37.Assuming that the researcher is using a two-tailed test,what decision should be made? A)The researcher should reject the null hypothesis with α = .05 but not with α = .01. B)The researcher should reject the null hypothesis with either α = .05 or α = .01. C)The researcher should fail to reject H₀ with either α = .05 or α = .01. D)The researcher should ignore the results.

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Quizplus · Accepted Answer

The z-score of 2.37 corresponds to a p-value of approximately 0.018, which is less than both α = .05 and α = .01. Therefore, the researcher should reject the null hypothesis at α = .05, but not necessarily at α = .01.

A Researcher Conducts a Hypothesis Test to Evaluate the Effect