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四、某次統計學測驗之平均分數是 65 分,而標準差為 10 分。若分數分配符合常態分布。【題組】⑴若最低錄取分數為 70 分,試求錄取比率。(10 分)
問題詳情
四、某次統計學測驗之平均分數是 65 分,而標準差為 10 分。若分數分配符合常態分布。
【題組】
⑴若最低錄取分數為 70 分,試求錄取比率。(10 分)
參考答案
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五、欲檢驗某疾病。設若有病,則有 0.9 之機率檢驗呈陽性反應;若無病,則有 0.05 之機率檢驗會呈陽性反應。又設受驗者中,有 1%有病。今隨機取 1 人,且呈陽性反應,試問其有病之機率。(15 分
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