Explanation and mediation problems

# Explanation and mediation problems - Example Examination...

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Example Examination Questions on Simon-Lazarsfeld Modeling The following two sets of questions are from a final examination and require application of Simon-Lazarsfeld modeling. Common Information for Questions 1, 2, and 3 A research team seeks to estimate the model w x Y E 2 1 0 ) ( β + + = . The variable Y is a measure of substance abuse disorder of a participant observed at age 25; the variable x is a measure of the extent of conduct disorder shown by the participant at age 18; and the variable w is a measure of the attention deficit hyperactivity behavior shown at age 12. They observe values of y, x , and w on 600 subjects. They find that the total sum of squares for Y is 40,000. The correlation between Y and w is 0.12; the correlation between Y and x is 0.38; and the correlation between x and w is 0.35. 1. Compute the analysis of variance table for the multiple regression analysis of Y . Include the sum of squares due to the regression on

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Explanation and mediation problems - Example Examination...

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