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Formula Koefisien Korelasi

Formula Koefisien Korelasi. Koefisien Korelasi:. atau:. dimana: r = koefisien korelasi n = ukuran sampel x = nilai var bebas y = nilai var terikat. Contoh Kasus. Contoh Perhitungan. Tinggi y. r = 0.886 → hubungan linier positif relatif kuat antara var x dan y. Diameter, x.

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Formula Koefisien Korelasi

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  1. Formula Koefisien Korelasi Koefisien Korelasi: atau: dimana: r = koefisien korelasi n = ukuran sampel x = nilai var bebas y = nilai var terikat

  2. Contoh Kasus

  3. Contoh Perhitungan Tinggi y r = 0.886 → hubungan linier positif relatif kuat antara var x dan y Diameter, x

  4. Uji Signifikansi untuk Korelasi • Hipotesis H0: ρ = 0 (tak ada korelasi) HA: ρ≠ 0 (ada korelasi) • Uji Statistik • (dgn n – 2 der. kebebasan)

  5. Lanjutan Apakah hub. Linier antara diameter dan tinggi tabung cukup signifikan pada taraf. signifikansi 0,05? H0: ρ= 0 (tak berkorelasi) H1: ρ≠ 0 (ada korelasi) =.05 , df=8 - 2 = 6

  6. Solusi Keputusan:Tolak H0 Kesimpulan:Ada hubungan linier pada taraf signifikansi 5% d.f. = 8-2 = 6 a/2=.025 a/2=.025 Reject H0 Do not reject H0 Reject H0 -tα/2 tα/2 0 -2.4469 2.4469 4.68

  7. RLS Populasi y Observed Value of y for xi εi Slope = β1 Predicted Value of y for xi Random Error for this x value Intercept = β0 x xi

  8. Penaksiran Model RLS (sampel) Estimated (or predicted) y value Estimate of the regression intercept Estimate of the regression slope Independent variable The individual random error terms ei have a mean of zero

  9. Persamaan RLS • Rumus Mencari b1 dan b0 : atau: dan

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