Researchers investigated whether drinking alcohol the evening before a test hurts the test-taking performance of college students. They recruited a random sample of 193 college students who each participated in the study twice. In random order, one evening they were given regular beer and another evening they were given non-alcoholic beer (placebo). Define /a as the mean difference in verbal test scores after drinking beer relative to placebo the evening before the test in the population of college students. Question 1: What is the correct set of hypotheses? O Ho : Ha = 0 Ha : Ha # 0 O Ho : Ha = 0 Ha : Ha 0