Null hypothesis TypeⅠerror Type Ⅱ error

Null hypothesis usually express the phenomenon of no effect or no difference.

TypeⅠerror is the incorrect rejection of a true null hypothesis.  That is, no difference is taken as difference.

Type Ⅱ error is incorrectly retaining a false null hypothesis. That is, difference is taken as no difference

来自为知笔记(Wiz)