Post hoc tests

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Post hoc tests

• So you find a significant difference in the
  ANOVA. This means something is different
  somewhere. How do you find it.
• Bonferroni- modified t test very conservative
• Scheffe- conservative for many multiple
  comparisons
• Tukey- less conservative than Scheffe for
  pairwise comparisons
• Student Newman Keuhls- also provides pairwise
  comparisons more sensitive
• Dunnett- Compares multiple groups to a single
  control. Limits the number of comparisons, so
  more sensitive.

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