Testing homogeneity of variance

Test if the variances of two or more independent samples are equal.

  1. Select a cell in the dataset.
  2. On the Analyse-it ribbon tab, in the Statistical Analyses group, click Compare Groups, and then click the hypothesis test.
    The analysis task pane opens.
  3. In the Y drop-down list, select the quantitative response variable.
  4. In the X drop-down list, select the categorical factor variable identifying the groups.
  5. In the Hypotheses drop-down list, select the null and alternative hypothesis.
  6. Optional: To compare the p-value against a predefined significance level, in the Significance level edit box, type the maximum probability of rejecting the null hypothesis when in fact it is true (typically 5% or 1%).
  7. Click Calculate.