Chapter Main Points and Learning Objectives

Chapter main points

  • Analysis of variance (ANOVA) procedures allow us to examine the variation in means in more than two samples. To determine whether the difference in mean scores is significant, ANOVA examines the differences between multiple samples, as well as the differences within a single sample.
  • One-way ANOVA is a procedure using one dependent variable and one independent variable. The five-step hypothesis testing model is applied to one-way ANOVA.
  • The test statistic for ANOVA is F. The F statistic is the ratio of between-group variance to within-group variance.

Learning objectives

  1. Explain the application of a one-way analysis of variance (ANOVA) model
  2. Define the concepts of between and within total variance
  3. Calculate and interpret a test for two or more sample cases with means
  4. Determine the significance of an F-ratio test statistic
  5. Interpret SPSS output for ANOVA