A Researcher Conducts a Repeated-Measures Study to Evaluate a Treatment

Multiple Choice

A researcher conducts a repeated-measures study to evaluate a treatment with a sample of n = 16 participants and obtains a t statistic of t = 1.94.The treatment is expected to increase scores and the sample mean shows an increase.What is the correct decision for a hypothesis test using α = .05?​

A) ​Reject the null hypothesis with a one-tailed test but fail to reject with two tails.
B) ​Reject the null hypothesis with either a one-tailed or a two-tailed test.
C) ​Fail to reject the null hypothesis with either a one-tailed or a two-tailed test.
D) ​Fail to reject the null hypothesis with a one-tailed test but reject with two tails.