Specify nested factors for Fit Mixed Effects Model

Stat > ANOVA > Mixed Effects Model > Fit Mixed Effects Model > Nest

Specify any factors that are nested within other factors. For more information on nesting, go to What are factors, crossed factors, and nested factors?.

Displays all the factors and covariates that are in the model. This column does not take any input.
Nested in specified factors
If a factor is nested in one or more factors, enter those factors. For multiple levels of nesting, enter only the factors that a factor is directly nested in. For example, assume that C is nested in B and B is nested in A. For C, enter only B.