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1 results

  • 9 - Comparing Means with Multiple Groups: The Analysis of Variance (ANOVA)

  • Anthony J. Girasoli, Eastern Connecticut State University
  • Book:
    Research Methods and Applied Statistics
    Published online:
    17 December 2025
    Print publication:
    02 October 2025, pp 264-323

  • Summary

    In the previous chapter, students learned how to compare the means of two groups with the t-test and U test. In Chapter 9, students are taught how to statistically compare three or more groups/levels among one or two independent variables. Students are also coached through three different kinds of ANOVAs: between-subjects, within-subjects, and between-within methods. The assumptions for these ANOVAs are reviewed and step-by-step instructions are given in SPSS and R. Student researchers are also taught how to interpret the results for testing hypotheses that use an ANOVA.