Exercise

Add Paths to Improve Fit

The three-factor model of the WAIS-III showed poor fit when examining the fit indices. You can use the modification indices to view potential parameter estimates to add to the model to improve fit. Correlated error terms are normal estimates to add, as the variance of the manifest variables on the same factor can be related to each other.

The data has been loaded for you and is called IQdata. You can view the data using head(IQdata).

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View the modification indices output and add the highest mi value to update the model.