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𝑍1𝛼/2 = nilai Z pada derajat kepercayaan 1 − 𝛼 𝑍1−𝛽 = nilai Z pada kekuatan Uji (power) 1 – β P1 = Proporsi yang terkena penyakit pada kelompok terpapar P2 = Proporsi yang terkena penyakit pada kelompok tidak terpapar