1. A total of 100 undergraduates were recruited to participate in a study on the effects of study location on learning. The study employed a 2 x 2 between-subjects design, with all participants studying a chapter on the science of gravity and then being tested on the to-be-learned material one week later. Fifty of the participants were asked to study the chapter at the library, whereas the other fifty were asked to study the chapter at home. As a separate manipulation, participants were either told to study the chapter for 30 min or 120 min. The hypothetical set of data shown below represents the level of performance of participants on the test as a function of condition. 30 min 120 min 80 Library Home 60 40 60 a) Is there a main effect of Study Location? In answering, provide the marginal means and state the direction of the effect (if there is one). b) Is there a main effect of Study Duration? In answering, provide the marginal means and state the direction of the effect (if there is one). c) Do the results indicate an interaction? If so, describe the nature of the interaction by comparing the simple effects. d) Illustrate the results with a bar graph (make sure the variables and axes are labeled appropriately) e) Interpret the results. What do they tell you about how study location affects learning? (be sure to refer to the interaction or lack thereof)