7. Researchers were evaluating the effect of demands on workers based on the time of day and

the degree of the demands. The data are shown below.

		Time Demand
		Low	Moderate	High
Time of Day	AM	43	53	60
50	55	59
49	52	56
43	53	54
51	55	58
PM	34	54	70
37	53	69
34	49	67
40	49	69
33	56	70

1. Write the null and alternate hypotheses for the study. Null Hypothesis :

b. Conduct a two-way ANOVA on these data at = 0.05 and interpret the results in terms of

significance. Be sure to discuss the interaction effect, the main effect of time of day, and the

main effect of time demands.