Rumus.docx

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𝑍1𝑎 √[2𝑝 (1 − 𝑃)] + 𝑍1−𝛽 √[𝑃1 (1 − 𝑃1 ) + 𝑃2 (1 − 𝑃2 )] } 𝑛=

2

(𝑃1 − 𝑃2 )2

{𝑍1𝑎 √[2𝑝 (1 − 𝑃)] + 𝑍1−𝛽 √[𝑃1 (1 − 𝑃1 ) + 𝑃2 (1 − 𝑃2 )]} 𝑛=

2

2

(𝑃1 − 𝑃2 )

Keterangan : 𝑛 = besar sampel minimal

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

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