推 KitWoolsey :simply 0.5% * 5 06/02 13:46
→ GameKnight :看到這種問題第一反應是,總共幾個產品? 06/02 14:09
推 mk426375 :跟個數無關,假設母體有n個,則不良的個數為0.5%*n 06/02 15:26
→ mk426375 :期望值=樣本數*取到不良品機率 06/02 15:27
→ mk426375 : =5 * (0.5*n)/n = 0.25% = 1/40 06/02 15:28
→ love15 :了解 感謝回答^^ 06/02 18:26