1. Researchers compared the effectiveness of a mood induction technique. They believed that more time exposed to a sad movie, the more depressed the participants will become. Researchers predict that each increase in time exposed, the greater the depression: 10 minutes will be greater than control, and 20 minutes will be greater than 10. There were 3 different groups of 14 participants each: 0 minutes exposure (Control Group), 10 minutes exposure, & 20 minutes exposure.The response variable is the score on the Beck Depression Inventory (higher score = more depressed mood).Analyze the data using alpha = .05.

Control

10 minutes

20 minutes

= 8

= 11

= 13

SS₁ = 56

SS₂ = 96

SS₃ = 62

n₁ = 14

n₂ = 14

n₃ = 14

SS_Total = 368

D.Relate your conclusion to the research

E.Are you allowed to conduct analytical comparisons? Yes or no? Why?

a.If yes, which groups would you compare? If not allowed, state n/a.

b.Regardless of whether you are allowed to conduct analytical comparisons or not, conduct a planned comparison between the control group and the 20 minutes group. Use alpha = .05.

i.State the hypothesis.

ii.Make a decision about the null.

iii.State conclusion regarding your planned comparison.

iv.Relate your conclusion to the research.