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Sparsity-of-effects principle
In the statistical analysis of the results from factorial experiments, the sparsity-of-effects principle states that a system is usually dominated by main effects and low-order interactions. Thus it is most likely that main (single factor) effects and two-factor interactions are the most significant responses in a factorial experiment. In other words, higher order interactions such as three-factor interactions are very rare. This is sometimes referred to as the ''hierarchical ordering principle''.〔 The sparsity-of-effects principle actually refers to the idea that only a few effects in a factorial experiment will be statistically significant.〔
This principle is only valid on the assumption of a factor space far from a stationary point.〔
==See also==
* Occam's Razor
* Pareto principle
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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