A Two-Tailed Hypothesis Test Is Being Used to Evaluate a Treatment

Multiple Choice

A two-tailed hypothesis test is being used to evaluate a treatment effect with α = .05.If the sample data produce a z-score of z = 2.24,then what is the correct decision?​

A) ​Reject the null hypothesis and conclude that the treatment has no effect.
B) ​Reject the null hypothesis and conclude that the treatment has an effect.
C) ​Fail to reject the null hypothesis and conclude that the treatment has no effect.
D) ​Fail to reject the null hypothesis and conclude that the treatment has an effect.