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Untuk menguji hipotesis berapa lama daya tahan baterai merk tertentu diperlukan sebuah sampel. Taraf kepercayaan yang dikehendaki adalah 95%. Perbedaan antara yang ditaksir dengan tolak

Untuk menguji hipotesis berapa lama daya tahan baterai merk tertentu diperlukan sebuah

sampel. Taraf kepercayaan yang dikehendaki adalah 95%. Perbedaan antara yang ditaksir

dengan tolak ukur yang ditetapkan dari pabrik tidak lebih dari 10 %. Jika simpangan baku daya

tahan baterai telah diketahui 15 % berapa jumlah sampel yang akan digunakan untuk penelitian?

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