. 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

A.State the hypotheses.

B.Make a decision about the null.

C.State your conclusion.

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.