ANOVA Calculators (BETA)
Welcome to the non-parametric calculators page. These tools are in development and are designed to walk you through common statistical tests step-by-step, from setting up your data to interpreting the final results. Each calculator is a complete guide to help you understand and perform your analysis. Select a tool below to get started.
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One-Way ANOVA Calculator
The starting point for comparing the means of three or more independent groups. This tool provides a full 7-step walkthrough of the hypothesis testing procedure, from stating hypotheses to calculating the F-statistic and determining statistical significance. It includes dynamic visualizations of your group means and the F-distribution curve to help you interpret the results, along with a calculation of the eta-squared effect size.
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Two-Way ANOVA Calculator
Use this calculator when you have two independent variables (factors). It analyzes the main effect of each factor as well as the crucial interaction effect between them. Following the 7-step model, it provides a complete ANOVA summary table, F-distribution curves for each effect, and a dynamic interaction plot to help you visualize and interpret your findings.
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Post Hoc Test Calculator (Tukey's HSD)
After finding a significant result in a one-way ANOVA, this calculator helps you perform the necessary follow-up analysis. It uses Tukey's HSD to conduct all possible pairwise comparisons, allowing you to identify exactly which group means are significantly different from one another. It also provides Cohen's d for each significant pair to assess practical significance.
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Follow-Up Tests for Two-Way ANOVA
Interpreting a two-way ANOVA requires different follow-up procedures depending on your results. This tool guides you through the correct analysis. If your interaction was significant, it provides a full Simple Main Effects analysis. If the interaction was not significant, it provides the option to run a Tukey's HSD on a significant main effect.
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SPSS Syntax Builder
Bridge the gap between learning and application. This tool generates the correct SPSS syntax for One-Way, Two-Way, and Repeated Measures ANOVA. It includes options for specifying follow-up tests (like Tukey's HSD, Bonferroni, and Simple Main Effects), generating plots, and requesting other common statistical outputs, matching the examples used in class.