[問題] a quadratic time effect?
小弟是讀醫學相關的科系~~
最近讀paper (非統計類) 遇到了問題
求救~~~~以谷歌大神過 但還是不太懂
我讀的一篇paper 要比較兩個group的差異 他列出
significant main effect of time (P < .001)
a group by time interaction effect (P < .0001)
a quadratic time effect (P < .0001)
a group by quadratic time interaction effect (quadratic term; P =.0005, see
Fig. 2).
前兩項我大概懂一點點 後兩項加quadratic是甚麼意思啊~
有請大大們解惑
然後有沒有相關的知識可以讀的~ 謝謝QQ
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