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 = 2.27 . If the researcher is using a one-tailed test, what is the correct statistical decision?
a. Reject the null hypothesis with ? = .05 but not with ? = .01.
b. Reject the null hypothesis with either ? = .05 or ? = .01.
c. Fail to reject the null hypothesis with either ? = .05 or ? = .01.
d. Cannot answer without additional information
A
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