psyc990_hw7sol - Psychology 990 Homework #7 Solutions (SAS...

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Psychology 990 Homework #7 Solutions (SAS Code in Appendix) Based on a study by Diener et al. (1985), the following five items of a questionnaire are reported in McDonald (1999): I am satisfied with my life. The conditions of my life are excellent. In most ways my life is close to ideal. So far I have gotten the important things I want from life. If I could live my life over, I would change almost nothing. Subjects (n=215) provided responses using the following seven-point scale: 1 2 3 4 5 6 6 Strongly Disagree Disagree Slightly Disagree Neither Agree nor Disagree Slightly Agree Agree Strongly Agree The correlation matrix from this data set is: 1.0000 0.6168 0.5916 0.4483 0.4856 0.6168 1.0000 0.5179 0.3216 0.4539 0.5916 0.5179 1.0000 0.4316 0.4568 0.4483 0.3216 0.4316 1.0000 0.4340 0.4856 0.4539 0.4568 0.4340 1.0000 Using the following code, import this matrix into SAS for this week’s homework: data swls (type=corr); input _type_ $ _name_ $ item1-item5; label item1= 'I am satisfied with my life.' item2= 'The conditions of my life are excellent.' item3= 'In most ways my life is close to ideal.' item4= 'So far I have gotten the important things I want from life.' item5= 'If I could live my life over, I would change almost nothing.' ; cards ; n . 215 . . . . corr item1 1.0000 . . . . corr item2 0.6168 1.0000 . . . corr item3 0.5916 0.5179 1.0000 . . corr item4 0.4483 0.3216 0.4316 1.0000 . corr item5 0.4856 0.4539 0.4568 0.4340 1.0000 ; 1. Run an exploratory factor analysis using the Principal Components algorithm, with a promax rotation, extracting two factors and printing out the residual correlation matrix (place the word ‘residuals’ on the proc factor line). a. What meaning can you derive for each factor? The rotated factor loadings are: Rotated Factor Pattern (Standardized Regression Coefficients)
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Factor1 Factor2 item1 I am satisfied with my life. 0.78303 0.14312 item2 The conditions of my life are excellent. 0.94590 -0.14494 item3 In most ways my life is close to ideal. 0.67518
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This note was uploaded on 03/15/2010 for the course STATISTIC 472 taught by Professor Amjad during the Spring '08 term at Yarmouk University.

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psyc990_hw7sol - Psychology 990 Homework #7 Solutions (SAS...

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