In a classic research study, Shrauger (1972) examined the effect of an audience on the performance of two different personality types. They recruited 4 groups of participants and measured errors made by each participant during their performance. Results were shown in the summary table.

	Control (Alone)	Audience
High Self-Esteem	n=6 M=4 SS=22	n=6 M=6 SS=22
Low Self-Esteem	n=6 M=7 SS=22	n=6 M=13 SS=20

Draw bar graph to show the results, make sure you label the factors (show the levels) and dependent variable correctly. (6 points)

Fill in all missing values in the table. (10 points) (Hint: find SS_within first, and then use the relations among SSs to complete the rest)

Source	SS	df	MS	F	p
Between Treatment
Self-esteem
Audience	150
Self-Esteem Audience	24
Within Treatment (Error)
Total	356

b. Evaluate main effects and the interaction with =0.05. Please follow the 4 steps of hypothesis testing and use the results from the summary table above. (12 points)

c. Summarize and explain the results (6 points).

d. Compute ² (the percentage of variance accounted for) for each of the main effects and for the interaction. (6 points)