交叉驗證（cross-validation）係統計學上一種做法，指隨機噉將數據嘅個案劏做 N 份；然後攞其中一份做測試，其餘啲份做驗證－跟住逐份逐份重複過呢個過程，睇吓喺一個樣本入面搵到嘅結果係咪喺第啲樣本入面都會搵到。
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