You are doing a study on the effect of eating vegetables on self-reported energy levels. You take a sample of n = 36 individuals and instruct them to eat at least 6 servings of vegetables, prepared in any way they choose, for three weeks. After three weeks, you instruct them to complete a survey in which they report their energy level. The average self-reported energy level was M = 10. Suppose the mean for the population is u = 20.5 and the standard deviation is o = 42. You want to answer the following research question: Does eating vegetables have an effect on self-reported energy levels? This is a two-tailed test, and the alpha level for this test is a = .05. What is the critical region for this test? O + 1.96 O - 1.6 O + 1- 1.65 O + 1 - 1.96 Previous Next >