A researcher conducts a study of the effects of amount of sleep on creativity. The creativity scores for four levels of sleep (2 hours, 4 hours, 6 hours, and 8 hours) for N = 20 subjects are presented here.

a. Complete the following ANOVA summary table. (If your instructor wants you to calculate the sums of squares, use the preceding data to do so.)

b. Is F_obt significant at α = .05; at α = .01?

c. Perform post hoc comparisons if necessary.

d. What conclusions can be drawn from the F-ratio and the post hoc comparisons?

e. What is the effect size, and what does this mean?

f. Graph the means.

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Amount of Sleep (in hours) 6 3 10 10 11 13 6. 13 10 4 3 9. 10 10 2. 2. Source Between groups Within groups Total MS 187.75 55.20 242.95 df