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More on ANOVA

Introduction

Answers

  1. False, the omnibus null hypothesis is that all population means are the same.
  2. True, an analysis of variance (ANOVA) is most often used to determine if there are differences among 3 or more group means. However, when there are more than 2 groups, an ANOVA does not provide information regarding where the differences lie.
  3. True, the Tukey HSD controls the Type I error rate and is valid without first running an ANOVA.