a. For these data, the sample variance is 9, the standard error is 1.50, and t = 3.00. With df = 3, the critical values are t = ±3.182. Fail to reject the null hypothesis. b. For a one-tailed test, the critical value is t = 2.353. Reject the null hypothesis and conclude that acupuncture treatment significantly reduces pain More test answers on https://studyhippo.com/psy-201-ch-11-repeated-measures/