You want to know whether taking daily multivitamins can reduce the risk of anemia in a high-risk population. You enroll 600 participants who are randomized to receive either multivitamins or a placebo pill. At the conclusion of your study, you assess each participant for anemia. Your results are as follows: Anemia Yes No Total Multivitamins 75 225 300 Placebo 100 200 300 Total 175 425 600