引用:
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作者vash
IMDB的評分計算小第一直覺得怪怪的,
滿分的人那麼多(起碼佔64%左右)怎麼會評分只有6.9?
照小弟的算法,應該是156(人數)*10(評分)+20*9+15*8+...+2*3+4*2+29*1/245
這樣得出來的數字是8.2才對.
請問有哪位知道IMDB6.9的算法是怎麼來的嗎?
還是小弟的算法有問題  |
點進去看
票數下有個 Arithmetic mean = 8.2
而有個記票說明在
Weighted Average
意思大概是IMDB會把試圖灌票的人濾除,細節計算方式我就不清楚了...
以下為原文說明:
Weighted Average Ratings
IMDb publishes weighted vote averages rather than raw data averages. Various filters are applied to the raw data in order to eliminate and reduce attempts at 'vote stuffing' by individuals more interested in changing the current rating of a movie than giving their true opinion of it.
The exact methods we use will not be disclosed. This should ensure that the policy remains effective. The result is a more accurate vote average.