有1000人參加某次測驗。測驗專家取該測驗總分前27%及後27%的學生，作為高分組及低分組，高分組答錯該題者有90人，低分組答錯該題者有180人。其難度為何？(A)0.33 (B)0.50 (C

問題詳情

28.有1000人參加某次測驗。測驗專家取該測驗總分前27%及後27%的學生，作為高分組及低分組，高分組答錯該題者有90人，低分組答錯該題者有180人。其難度為何？
(A)0.33
(B)0.50
(C)0.67
(D)0.83

參考答案

答案：B
難度：適中0.565733
統計：A(465),B(1859),C(355),D(192),E(0) #
個人：尚未作答書單：鑑別度

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