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Class Exercise

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Hays (5 th ed) p. 520 A study involved children of three age groups: A1=5yrs, A2= 6 years, A3 = 7 years. Second Factor was formal preschool experience B1=none, B2=1 year, B3 = more than 1 year Five children were sampled from each combination and given a score on ‘social maturity’ (high scores are more mature)

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B1B2B3 A1224 678 8811 A11085 A19103 A2769 9914 A211915 A29710 A28812 A3151315 A312 18 A391021 A3106 A3149

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Enter the data into SAS Print the data to be sure they are correct Be sure the data are arranged in the way SAS needs to analyze the problem

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Run a 2-Way ANOVA on the data What terms are significant What is the interpretation at the level of main effects and interactions from the printout?

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Graph the means What is the interpretation of the means according to the graph? You can use a program other than SAS for the graph if you want.

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What is the magnitude of effect What is R-square for A, B, and A*B? What is estimated omega-squared for each?

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Regression For the purposes of this class: –Does Y depend on X? –Does a change in X cause a change in Y? –Can Y be predicted from X? Y= mX + b Predicted.

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