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Published bySandra Pope Modified over 9 years ago
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Graphs in HLM
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Model setup, Run the analysis before graphing Sector = 0 public school Sector = 1 private school
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Graph entire model
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With level 1 predictor
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Here it is the graph
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Add level 2 categorical variable
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And the graph
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Add level 2 continuous variable
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What happened if we choose 25 th and 75 th percentiles?
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We can choose other options, say, 25 th /50 th /75 th percentiles
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The graph with 3 MEANSES levels
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More complicated graph
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Graph level 1 equation
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The graph with first 10 groups (schools)
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What if we choose n=160 schools?
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With level 2 predictor: sector
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Add level 2 categorical variable
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Add a level 2 continuous variable
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Level 1 residual box-whisker To examine distributions of level-1 residuals. Normality assumption Homogeneity of variance
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Level 1 residual box-whisker
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Also could add a level 2 predictor
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Level-1 residual vs predicted value
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Observe the pattern of residual scatter Level-1 residual vs predicted value
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Add level 2 - sector
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One graph per group, multiple graphs per page
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Level-2 EB/OLS coefficient confidence intervals Compare the estimated empirical Bayes (EB) and OLS estimates of randomly varying level-1 coefficients (intercept and other coefficients).
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Intercept with level 2 sectors
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Intercept with level 2 MEANSES
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Slope of SES
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Graph data
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Math regressed on SES (10 schools)
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One graph per group, multiple graphs per page
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Longitudinal data
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Whole model (CB- HLM Longitudinal Example)
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With gender and year (level 2)
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Graph data
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