The next set is notes alone vs book alone and notes alone vs borrowed, and the set after that is borrowed against book alone and borrowed against notes alone. borrowed notes is not significant (p > 0.05). notes alone, is significant (p = 0.004), while book alone vs. For example, the Tukey HSD test, book alone vs. For each, you will see the results of each pairwise comparision. The output for these three tests is presented below. Notice that to do these tests you need to specify what level of a you want to use. Some of the most common are Tukey's HSD, Fisher's LSD, and Scheffe (a very conservative post hoc test). All you need to do is to click on the box of the kind of post hoc test that you want to do. If the F statistic is significant (p 0.05)Ĭomparison 3 (group 2 vs 3) is significant (p = 0.001).F statistic indicates whether the between-groups variability is significantly greater than the within-groups variability.ANOVA analyzes variance by separating it into two parts.If the interaction is significant it does not make sense to interpret (only the) main effects.The variance of the continuous dependent variable is roughly equal in all groups.The continuous dependent variable is distributed close to normal.Observations are independent of one another.Assumptions for the two-way ANOVA are the same as for the one-way ANOVA.
Tests the null hypothesis that the means of all groups of Factor 1 are equal ( The main effect of factor 1) This tutorial assumes that you have started SPSS (click on Start All Programs SPSS for Windows SPSS 12.0 for Windows).The values of the independent variable are called the "levels".The independent variable is often called a "factor".Independent variables are categorical (e.g., year in school, experimental condition).Two-way ANOVA allows us to add a second factor (independent variable) One-way ANOVA examines whether the means of two or more groups differ SPSS for Windows: 2-way (independent groups) ANOVA Procedures