A chi-square goodness-of-fit test examines if a categorical variable has some hypothesized frequency distribution in some population.

In ANOVA and regression, an interaction effect means that some effect depends on another variable.

Example: women become happier but men become unhappier if they have children. So the effect of having children depends on sex.

This tutorial walks you through testing for and interpreting interaction effects in ANOVA.

Run your SPSS two way ANOVA the right way in 5 simple steps. With downloadable data file, enhanced screenshots and annotated output.

SPSS TableLooks are tiny text files that apply styling -fonts, colors, borders and more- to SPSS output tables. This tutorial quickly gets you started.

SPSS’ output window shows the tables, charts and statistical tests you run while analyzing your data.

This tutorial walks you through some basics such as exporting tables and charts to WORD or Excel. We'll also point out some important tricks such as batch editing and styling tables and charts.

SPSS stepwise regression analysis in normal language. With illustrations, downloadable practice data and syntax.

How to run a one sample t-test correctly in SPSS?

This simple tutorial with downloadable practice data quickly walks you through the right steps!