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Home Q & A Board Biology-Related Homework Help Medicine Nursing and Clinical
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Martini306 Martini306
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6 years ago
Why is post hoc statistical testing not performed with a two-group ANOVA?
 
  a. A researcher is reluctant to perform a post hoc analysis that would require a more stringent level of significance.
  b. The F-statistic would be invalidated by the second test.
  c. If hypothesis testing reveals that a difference between groups exists, it is obvious what two groups those are.
  d. Sample sizes are not large enough for this analysis.
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6 years ago
ANS: C
Post hoc tests have been developed specifically to determine the location of group differences after ANOVA is performed on data from more than two groups. The post-hoc analyses performed after the ANOVA preserves the same level of analysis as the ANOVA itself. The F-statistic is not invalidated by performing a post hoc analysis. Sample size is not a consideration when performing a post hoc analysis.
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