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Example
2
Testing Hypotheses
Introduction
This example demonstrates how you can use Amos to test simple hypotheses about
variances and covariances. It also introduces the chi-square test for goodness of fit and
elaborates on the concept of degrees of freedom.
About the Data
We will use Attig’s (1983) spatial memory data, which were described in Example 1.
We will also begin with the same path diagram as in Example 1. To demonstrate the
ability of Amos to use different data formats, this example uses a data file in SPSS
Statistics format instead of an Excel file.
Parameters Constraints
The following is the path diagram from Example 1. We can think of the variable
objects as having small boxes nearby (representing the variances) that are filled in
once Amos has estimated the parameters.