多項分佈

多項分佈（multinomial distribution）係一個將二項分佈廣義化成嘅離散概率分佈，描述嘅試驗有 $k$ 個可能結果，做 $n$ 咁多次（想像掟一粒 $k$ 面嘅骰仔掟 $n$ 咁多次）。概率質量函數係^[1]：

f(k,n,p)={\frac {n!}{x_{1}!\cdots x_{k}!}}p_{1}^{x_{1}}\cdots p_{k}^{x_{k}}

攷

↑ Ostrovski, Vladimir (May 2017). "Testing equivalence of multinomial distributions". Statistics & Probability Letters. 124: 77–82.

呢篇文係同數學分析有關楔位文。歡迎幫維基百科擴寫佢。