4x3 factorial anova is the design that examines the effects of region of residence (e.g., northeast, south, midwest, and west) and income.
What is ANOVA?
This term is used to refer to what is called the Analysis of variance. It is a statistical tool that shows variability that is contained in a dataset.
It helps to separate variance into several different components which is used for analysis.
Read more on ANOVA here:
https://brainly.com/question/25800044
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