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Ringkasan statistik yang diperoleh bagi dua sampel bebas adalah seperti dalam jadual di Bawah: = 25 = 25 Jenama X = 7.30 1.05 Jenama

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Ringkasan statistik yang diperoleh bagi dua sampel bebas adalah seperti dalam jadual di Bawah: = 25 = 25 Jenama X = 7.30 1.05 Jenama Y 6.80 1.20 Diandaikan varian kedua-dua populasi adalah sama. Maka, ralat piawai (standard error) bagi perbezaan min sampel ialah A. 0.3189 2.5425 1.1275 1.2713 0.1017

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