30.藉由兩種抗原檢驗法檢驗犬瘟熱感染,若研究者想以平行檢測方式達到整體90%的..-阿摩線上測驗
最佳解! | ||
6F Bolly 大二下 (2020/06/30)
平行檢定:只要一個是陽就陽;敏感度會增加,特異性會降低。偽陽性會增加 Overall Sen = 1-[(1-sen(A))x(1-sen(B))] Overall Spe = spe(A) xspe (B)
序列檢定:兩個都要陽才陽;敏感性會降低,特異度會增加。偽陰性會增加 Overall Sen (或叫做net sen) = Sen(A) x Sen(B) Overall Spe (或叫做net spe) = 1-[(1-spe(A))x(1-spe(B))] 計算:0.9=1-[(1-0.7)*(1-x)] 0.1=0.3-0.3x x=66.66666666666........最接近70 |
7F
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8F
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