7. A researcher conducts a hypothesis test to evaluate the effect of a treatment. The hypothesis test produces a z-score of -2.28. Assuming that the researcher is using a two-tailed test, what is the correct statistical decision? Circle one. a. Reject the null hypothesis at .05 but not at .01 b. Reject the null hypothesis at both .05 and .01 c. Fail to reject the null hypothesis at both .05 and .01 d. Cannot answer without additional information
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A z-score represents the number of standard deviations a data point is from the mean. A negative z-score indicates that the data point is below the mean. Show more…
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