## 故障率(4)

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## CDFとPDFの関係

(2.8)に対して、(4.3)及び(4.1)を代入すれば、故障率$\lambda(t)$と故障密度関数$f(t)$の関係が(4.4)のように求められます。 $\lambda(t)=\frac{f(t)}{R(t)} \tag{4.4}$

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