A firm is studying the effect of work shift and parts supplier on its defect rate (dependent variable is defects per 1000) .The resulting ANOVA results are shown below (some information is missing) . 
At α = 0.01,the interaction effect is:
Definitions:
Corporation
A legal entity created under state law, considered distinct from its owners, that can own property, incur debt, sue and be sued.
Service of Process
The procedure by which a party to a lawsuit gives an appropriate notice of initial legal action to another party, court, or administrative body.
President
The elected head of a Republican state or the chief executive officer of a company or organization.
Agent
An individual authorized to act on behalf of another person or entity, often in a legal or business setting.
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