A researcher conducts a hypothesis test to evaluate the effect of a treatment. The hypothesis test produces a
z-score of z= -2.40. Assuming that the researcher is using a two-tailed test, what is the correct statistical
decision?
O Reject the null hypothesis with either a = .05 or a = .01.
Reject the null hypothesis with a = .05 but not with a = .01.
cannot answer without additional information
O Fail to reject the null hypothesis with either a = .05 or a = .01.