Editing Engineering statistics (section)

=== Factorial Experimental Design ===
{{Main|Factorial experiment}}
A factorial experiment is one where, contrary to the standard experimental philosophy of changing only one independent variable and holding everything else constant, multiple independent variables are tested at the same time. With this design, statistical engineers can see both the direct effects of one independent variable ([[main effect]]), as well as potential [[Interaction (statistics)|interaction effects]] that arise when multiple independent variables provide a different result when together than either would on its own.