PPM怎么做呢,不良率不对啊
PPM=IF(AE26="","",(1-NORMSDIST(STANDARDIZE(K5,AD17,AE26))+NORMSDIST(STANDARDIZE(K7,AD17,AE26)))*1000000)
这个错了,把1-删了,NORMDIST就是正太分布函数,1-就是良率了 quanhui1990 发表于 2021-4-20 17:12
PPM=IF(AE26="","",(1-NORMSDIST(STANDARDIZE(K5,AD17,AE26))+NORMSDIST(STANDARDIZE(K7,AD17,AE26)))*100 ...
谢谢{:1_101:} {:1_180:}
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