x Q anne bradstreet - Search X X V x X Lheandro Lemite's Calendar X Q thomas jefferson audience x . thomas jefferson purpose - .connexus.com/content/media/456845-7272018-84156-AM-115482743.pdf T Add text Draw Highlig | [ Page view A Read aloud Valid or Not? Worksheet Directions: Read the caffeine addiction study and complete a study analysis by answering the following questions. Refer to the lesson for details on the caffeine addiction study as needed. Be sure to answer each question completely. 1. What research question was investigated? 2. What design type was used: observational, experimental, or qualitative? Explain your answer. 3. How were subjects selected (or not selected) for the study? What (if any) impact did that process have? 4. What role did randomization play in this study? Specifically, did the researchers use randomization when selecting subjects for the study or when selecting the order in which the caffeine/placebo were given to the subjects?. It played a role because it was used to decide who gets what pills on which day and this probably would in term affect the outcome of the study because the pills were same time. given to different people on different days instead everyone getting the pills at the search O P 89