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An experimenter is interested in the effects of strength of reinforcement, and type of reinforcement on children's behavior. Each factor consists of two levels. Thirty-two

An experimenter is interested in the effects of strength of reinforcement, and type of reinforcement on children's behavior. Each factor consists of two levels. Thirty-two children are randomly assigned to 4 cells (i.e., 8 per cell), one for each of the factor combinations. Research question: is the mean response affected by strength of reinforcement and /or type of reinforcement?

(a). What type of model would be most appropriate to analyze the data? Why?

(b). Write an appropriate model according to your answer for part (a), clearly explaining each term in the model.

(c). Write appropriate null and alternative hypotheses that can be used to answer the researcher's questions.

(d). Complete the following ANOVA table based on your model in part b.

Source

SS

DF

MS

F

strength of reinforcement

24.50

type of reinforcement

0.125

Interaction

Error

209.75

Total

235.5

(e). Use the ANOVA table in (d) to perform a test of the hypotheses in part (c). =.05

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