# 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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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 A1224 678 8811 A11085 A19103 A2769 9914 A211915 A29710 A28812 A3151315 A312 18 A391021 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?

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