ch.10 summarizing data 10.2 methods based on the c.d.f
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Ch.10 Summarizing Data 10.2 Methods based on the C.D.F. Figure10.1. Eg：Guinea pig 接種不同劑量的結核菌( tubercle bacilli) Control group(107 隻) Inoculated group ⅠⅡⅢⅣⅤ 各72隻,按照劑量順序排列 表10.2.1 表10.2.2 在 Control group 及較低量的注射劑群並非所有的天竺鼠都死，因此在 - PowerPoint PPT PresentationTRANSCRIPT
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Eg： Guinea pig 接種不同劑量的結核菌 (tubercle bacilli)
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Inoculated group ⅠⅡⅢⅣⅤ 各 72 隻 , 按照劑量順序排列 表 10.2.1
表 10.2.2
在 Control group 及較低量的注射劑群並非所有的天竺鼠都死，因此在 Control group 中只有 65筆 data,在 DoseⅠ及 DoseⅡ 分別都只有 60,67筆 data
目的：比較對不同抵抗力的天竺鼠，其增加注射劑量的效果差別！Eg ：對 Group Ⅲ 及Ⅳ (1) 對抵抗力較弱的天竺鼠 ( 其生命中 10% weakest ，即在圖中的 y 軸畫 0.9 的水平線其所對應的 x 軸，即為此 10% weakest 的最長生命期 )
Group Ⅲ 及Ⅳ的差距約在 50 天 (2) 然而對抵抗力較強的天竺鼠， Group Ⅲ 及Ⅳ的差距大約在 100 天左右
10.2 10.3
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Eg ：天竺鼠的例子(1) 一開始的 hazard function 在每個 group 中都很小
(2) 隨著注射劑量的增加，其瞬時死亡率不僅增加且其增加的速率也隨著劑量的增加而加快
E.g.Ⅲ及Ⅴ的比較，Ⅴ較Ⅲ其 instant mortality rate 增加的速率較 快，且最後其曲線所相對的斜率也較Ⅲ的相對斜率更大 Figure10.2
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