Consider the partially completed two-way ANOVA (with interaction) summary table. 
The degrees of freedom for the interaction of factors A and B is ________.
Definitions:
Business-to-Business
A model of commerce between companies, such as wholesalers selling to retailers, distinct from transactions involving individual consumers.
Website Stickiness
A measure of a website's effectiveness in keeping visitors engaged and returning to the site.
Unique Daily Visitor
A metric in web analytics that represents the number of distinct individuals requesting pages from a website during a given day, not counting repeat visits by the same individual.
Design Element
An individual visual component or feature used in creating a piece of design work, such as color, shape, or typography.
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