Statistics - Analysis of Variance

To produce the Analysis of Variance (ANOVA) table set choose Statistics Analysis of Variance. An analysis of variance table is meaningful only when the column variable is a number field and the row variable is a multiple choice type field in crosstabulation.

Analysis of Variance tests for the null hypothesis that all the categories have the same average value for the column variable. If at least two categories are not the same, the hypothesis will be rejected. This test is based on the assumption that all categories have the same variance.

To create an ANOVA plot:

  1. Select Statistics Analysis of Variance or use the keyboard combination Ctrl+Shift+A. The Analysis of Variance dialog box will appear.
  2. In the listbox labeled Select Row question, select the row question to use in the plot; in the listbox labeled Select Column question select the column question to use in the plot.
  3. Click Finish to insert the plot on the page.

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