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（三）抽样推断（续）【例题详解】【问题1】1．求样本废品率2求总体单位数：3．求样本成数的平均抽样误差：由于是不重复抽样，故由公式④得4．求总体成数P的置信区间：区间下限：区间上限：5．以95％的可靠度估计这批产品的废品率在1．35％－6．65％之间。[问题2]这是以总体
(C) sampling inference (Continued) [examples of detailed explanation] [Question 1] 1. Seek the sample reject rate 2 seek the overall number of units: 3. Find the sample average sampling error: Because it is not repeated sampling, so by the formula ④ get 4. Seeking the overall number of P confidence interval: Interval lower limit: Interval upper limit: With a reliability of 95%, the rejection rate of these products is estimated at 1.35% -6.65%. [Question 2] This is based on overall