What is the null hypothesis in an ANOVA test?

  • The means of all groups are different
  • The means of all groups are equal
  • The variances of all groups are different
  • The variances of all groups are equal
The null hypothesis in an ANOVA test is that the means of all groups are equal. If the p-value obtained from the ANOVA test is less than the significance level, the null hypothesis is rejected, implying that there is a significant difference between at least two of the group means.
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