Class Exercise. 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.

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Presentation transcript:

Class Exercise

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)

B1B2B3 A A11085 A19103 A A A29710 A28812 A A A A3106 A3149

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

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?

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.

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