hw07 - Soc 63993, Advanced Social Statistics II Homework...

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Homework #7—Nonlinear effects/Intro to Path Analysis—Page 1 Soc 63993, Advanced Social Statistics II Homework No. 7 Nonlinear effects/ Intro to path analysis Problem 1. The files nonlinhw.sps and nonlinhw.sav will generate the computer runs you need for this problem. Copy them from the course web page. [Note: The output looks a little different in different versions of SPSS, but as far as I can tell the key elements stay the same.] There are 4 variables in nonlinhw.sav: X1 (the IV), Y1, Y2, and Y3 (the DVs). The SPSS program does scatterplots of X1 versus each IV. It also uses the SPSS Curvefit and Regression routines to fit models to these data. For each IV in turn, you are to do the following: Examine each scatterplot. Explain why the relationship is nonlinear and what type of nonlinearity appears to be present. Discuss what problems result from a linear (mis)specification. The SPSS Curvefit results will probably help you here. Curvefit shows you what the linear prediction is and compares that
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hw07 - Soc 63993, Advanced Social Statistics II Homework...

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