Learning Objectives

  • Explain why multiple t tests are not appropriate when an independent variable has more than two categories.
     
  • Describe the importance of the variance in testing the difference between means.
     
  • Identify and interpret the total, between and within group sum of squares and their relationship to testing the difference between means.
     
  • Conduct a hypothesis for the difference between three or more group means and interpret the results.
     
  • Describe the purpose of John Tukey’s Honest Significance Difference (HSD) test.
     
  • State the difference between measures of association and the analysis of variance (ANOVA) hypothesis test