[考題] 106臺北市國中教育Q.35
用試題分析理論來算,數字似乎不符合答案,連數學老師都算不出來。有沒有強者可以解
惑呢?
35. 請依據以下資料分析試題難度與鑑別度:全校100人,平均數為70,標準差為10,
將該校成績依據高低分排序,且將成績最前及最後27%的人數設定為高分組及低分組,有
一個題目全校答對人數為80,而此題高分組答對人數為20,低分組答對人數為10,請問此
題的難度及鑑別度指數分別為:
(A).20及.15 (B).80及.15
(C).20及.56 (D).80及.56
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推
06/04 16:16, , 1F
06/04 16:16, 1F
推
06/04 16:17, , 2F
06/04 16:17, 2F
→
06/04 16:17, , 3F
06/04 16:17, 3F
推
06/04 16:19, , 4F
06/04 16:19, 4F
→
06/04 16:19, , 5F
06/04 16:19, 5F
→
06/04 16:19, , 6F
06/04 16:19, 6F
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06/04 16:24, , 7F
06/04 16:24, 7F
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06/04 16:43, , 8F
06/04 16:43, 8F
推
06/04 16:48, , 9F
06/04 16:48, 9F
→
06/04 16:48, , 10F
06/04 16:48, 10F
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06/04 16:52, , 11F
06/04 16:52, 11F
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06/04 16:56, , 12F
06/04 16:56, 12F
→
06/04 16:57, , 13F
06/04 16:57, 13F
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06/04 17:15, , 14F
06/04 17:15, 14F
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06/04 17:58, , 15F
06/04 17:58, 15F
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06/04 19:51, , 16F
06/04 19:51, 16F
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06/04 20:21, , 17F
06/04 20:21, 17F
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06/04 20:57, , 18F
06/04 20:57, 18F
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06/04 21:48, , 19F
06/04 21:48, 19F
→
06/04 21:49, , 20F
06/04 21:49, 20F
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06/05 11:03, , 21F
06/05 11:03, 21F
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06/05 11:03, , 22F
06/05 11:03, 22F
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06/05 11:03, , 23F
06/05 11:03, 23F
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06/05 16:46, , 24F
06/05 16:46, 24F
推
06/05 22:35, , 25F
06/05 22:35, 25F
→
06/05 22:37, , 26F
06/05 22:37, 26F
推
06/06 23:52, , 27F
06/06 23:52, 27F