Please show your work and explain reasoning.

Schacter and Gross (1968) gathered data from a group of 60 male students for about one hour in the afternoon. At the end of this period of time, a clock on the wall was correct (5:30 pm) for 20 participants, slow (5:00 pm) for 20 others, and fast (6:00 pm) for 20 more. The actual time for all groups was 5:30 pm. While participants filled out a final questionnaire, the experimenters provided crackers for the students to eat. The weight of the crackers consumed was measured. They found that the amount of crackers eaten (in grams) was lowest for the slow clock group and highest for the fast clock group. Imagine you attempt to replicate this study but fail to find an effect. What are three things you could try to do to increase your statistical power? Explain your answers. f'_'__T