A Researcher Conducts a Hypothesis Test to Evaluate the Effect

question 29

Multiple Choice

A researcher conducts a hypothesis test to evaluate the effect of a treatment that is expected to increase scores.The hypothesis test produces a z-score of z = 2.37.If the researcher is using a one-tailed test, what is the correct statistical decision?

• A)Reject the null hypothesis with α = .05 but not with α = .01.
• B)Reject the null hypothesis with either α = .05 or α = .01.
• C)Fail to reject the null hypothesis with either α = .05 or α = .01.
• D)cannot answer without additional information

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Definitions:

Critical Value

A threshold value that the test statistic must exceed in order to reject the null hypothesis in a statistical test.

Independent Variables

Variables in a study or model that are expected to influence or determine the outcome of the dependent variable(s), manipulated by the experimenter.

Degrees Of Freedom

The number of independent pieces of information in a dataset used in the calculation of a statistic, typically influencing the shape of various distributions.