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Multiple Comparisons: Tukey-Kramer Test definitions

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  • Multiple Comparisons
    Simultaneous evaluation of several group means to determine which differ significantly from each other.
  • Tukey-Kramer Test
    A statistical method for comparing all possible pairs of group means while controlling overall error rate.
  • Familywise Error Rate
    The probability of making one or more Type I errors across a set of hypothesis tests.
  • Pairwise Comparison
    A statistical assessment between two group means within a larger set of groups.
  • Studentized Range Distribution
    A probability distribution used to determine critical values for comparing group means.
  • Critical Value
    A threshold from a statistical distribution used to judge significance in hypothesis testing.
  • Mean Difference
    The arithmetic subtraction of one group average from another to assess magnitude of separation.
  • Significance Level
    The probability threshold below which a result is considered statistically meaningful.
  • Confidence Interval
    A range of values likely to contain the true difference between group means with a specified probability.
  • Homogeneity of Variances
    An assumption that all groups being compared have similar variability in their data.
  • Post Hoc Test
    A statistical procedure conducted after an overall test indicates significant differences among groups.
  • ANOVA
    A statistical technique for testing whether three or more group means are equal.