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PT Devanka Multi Abadi merupakan produsen roti. Mesin lama dapat memproduks 24 kotak roti dalam waktu 42 menit. Untuk meningkatkan produksi, manajemen perusahaan berniat untuk

PT Devanka Multi Abadi merupakan produsen roti. Mesin lama dapat memproduks 24 kotak roti dalam waktu 42 menit. Untuk meningkatkan produksi, manajemen perusahaan berniat untuk mengganti dengan mesin baru. Mesin baru ternyata dapat memproduksi 24 kotak roti dalam waktu 40 menit dengan standar deviasi 3 menit Dengan taraf nyata 1%, ujilah pertanyaan apakah mesin baru dapat meningkatkan produksi roti pada perusahaan tersebut

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