12.07.2015 Views

Teori Distribusi Sampling

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GD2212 - Hitung Perataan I B. Setyadji, Mei 2007rata-rata 400.012 m (= ¯x) dengan standar deviasi S = ±0.002. Apakahjarak hasil ukuran berbeda secara signifikan dari “jarak yang benar” padatingkat kepercayaan 0.05?Penyelesaian:• Digunakan uji dua-ekor (two-tailed test).• Hipotesa nol H 0 : µ = 400.008• Hipotesa alternatif H a : µ ≠ 400.008• Uji statistiknyat = ¯x − µS/ √ n=400.012 − 400.0080.002/ √ 20= 8.944– Typeset by FoilTEX – 17

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