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1. Diberikan dua buah sampel dengan data: Sampel : 38, 42, 51, 47, 38, 60, 57, 58, 32, 45 Sampel II: 44, 49, 53, 46,

1. Diberikan dua buah sampel dengan data: Sampel : 38, 42, 51, 47, 38, 60, 57, 58, 32, 45 Sampel II: 44, 49, 53, 46, 41, 47, 34, 60, 59, 63 yang diambil dari dua buah populasi. Untuk menentukan batas-batas interval kepercayaan selisih rata-rata sebenarnya antara kedua populasi, asumsi apa yang diambil? Tentukan interval kepercayaan 95% untuk selisih tersebut, jika: a. simpangan baku kedua populasi diketahui sama besar, ialah 9,5. b. simpangan baku kedua populasi sama besar tetapi tidak diketahui nilainya. C. simpangan baku kedua populasi tidak sama besar

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