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GD2212 - Hitung Perataan I B. Setyadji, Mei 2007Selang Kepercayaan untuk Perbandingan Dua VariansiPopulasiEstimator:F = χ2 1/u 1χ 2 2 /u 2Substitusikan estimator χ 2 menghasilkanF = S2 1S 2 2× σ2 2σ 2 1Pernyataan probabilitas:– Typeset by FoilTEX – 14
GD2212 - Hitung Perataan I B. Setyadji, Mei 2007P(F 1−α/2,u1 ,u 2< F < F α/2,u1 ,u 2) = 1 − αP(F l < F < F u ) = P(F l < S2 1S 2 2× σ2 2σ 2 1< F u)( 1= P × S2 1F lS 2 2< σ2 1σ 2 2< S2 1S 2 2× 1 F u)= 1 − αSelang kepercayaan:S 2 1S 2 2×1F α/2,u1 ,u 2< σ2 1σ 2 2< S2 1S 2 2× F α/2,u2 ,u 1dengan F l = F 1−α/2,u1 ,u 2=1F α,u2 ,u 1– Typeset by FoilTEX – 15
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Teori Distribusi Sampling

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