Do you think running a two-way ANOVA with an interaction effect is challenging? Then this is the tutorial for you. We’ll run the analysis by following a simple flowchart and we’ll explain each step in simple language. After reading it, you’ll know what to do and you’ll understand why. We’ll use depression.sav throughout. The screenshot below shows it in variable […]
A hospital wants to know how a homeopathic medicine for depression performs in comparison to alternatives. They administered 4 treatments to 100 patients for 2 weeks and then measured their depression levels. The data, part of which are shown above, are in depression.sav. Data Inspection – Split Histogram Before running any statistical tests, let’s first just […]
SPSS One-Way ANOVA tests if the means on a metric variable for three or more populations are all equal. * The populations are identified in the sample by a categorical variable. For a very simple explanation of the basic idea, see ANOVA – What Is It?. SPSS One-Way ANOVA Example A farmer wants to know if the weight of parsley plants is […]
ANOVA -short for “analysis of variance”- is a statistical technique for testing if 3(+) population means are all equal. ANOVA – Null Hypothesis Test Statistic – F Assumptions for ANOVA Effect Size – (Partial) Eta Squared ANOVA – Post Hoc Tests The basic idea behind ANOVA: are 3(+) population means all equal? The two simplest […]
Research Question How to lose weight effectively? Do diets really work and what about exercise? In order to find out, 180 participants were assigned to one of 3 diets and one of 3 exercise levels. After two months, participants were asked how many kilos they had lost. These data -partly shown above- are in weightloss.sav. We’re […]
SPSS One-Way ANOVA Tutorials ANOVA – Simple Introduction SPSS One-Way ANOVA SPSS One-Way ANOVA with Post Hoc Tests SPSS Two-Way ANOVA Tutorials SPSS Two Way ANOVA – Basics SPSS Two-Way ANOVA with Interaction Repeated Measures ANOVA Tutorials Repeated Measures ANOVA – Simple Introduction SPSS Repeated Measures ANOVA – Tutorial SPSS Repeated Measures ANOVA – Example […]
