<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/0f59b405db2f40c59bce3eba5496732b.png?x-oss-process=image/sharpen,200"/>析因设计的统计模型总共包含<img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/db8b8fab66464e639eb720abb1c783fc.png?x-oss-process=image/sharpen,200"/>个效应（考虑交互效应）。