Use One-Way ANOVA when you have a categorical factor and a continuous response and want to determine whether the population means of two or more groups differ. If the test finds that at least one group is different, use the Comparisons dialog in one-way ANOVA to identify pairs of groups that are significantly different.

For example, a carpet manufacturer wants to determine whether there are differences in durability among several types of carpet.

To perform a one-way ANOVA, choose .

- If you have two or more fixed categorical factors, use Fit General Linear Model if you have all fixed factors or Fit Mixed Effects Model if you have random factors.
- If you want to plot the relationship between one continuous (numeric) predictor and a continuous response, use Fitted Line Plot.
- If you have more than one predictor, use Fit Regression Model.
- If you have only categorical variables for both the response and factors, go to What is a generalized linear model? to learn which type of regression analysis to use.