Question: Let’s say you carry out a study of memory-enhancing drugs on number of words in a list recalled an hour after study for pools of 8 volunteers each (total 32 volunteers). In the experiment you give 8 patients Drug 1, 8 other patients receive drug 2 and the final 8 patients drug 1 and 2 in combination. Here are your results:

a. Create an appropriate graph to compare these data, making sure to label your graph axes appropriately and to give it an appropriate title. (4 points)

b. Carry out the appropriate statistical analysis using SPSS to test whether the levels are different. Please provide me with your output and interpretation of it. (3 points)

c. Was the assumption of homogeneity of variance met? Explain (2 points)!

d. Using one or more post hoc tests, which means were different to which? (1 points)