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tolong bantu jawab dan mohon penjelasannya ya kak 25/ Nilaitengah skor tes bakat bagi mahasiswa tingkat persiapan di suatu perguruan tinggi adalah 540 dengan simpangan

tolong bantu jawab dan mohon penjelasannya ya kak

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25/ Nilaitengah skor tes bakat bagi mahasiswa tingkat persiapan di suatu perguruan tinggi adalah 540 dengan simpangan baku 54. Hitunglah peluang bahwa dua grup maasiswa vang diambil secara acak, masing-masing 32 dan 50 mahasiswa, mempunyai selisin nilaitengah skor (a) lebih besar daripada 20; (b) antara 5 dan 10? Anggaplah biaya nilaitengah skor itu dicatat sampai ketelitian berapa pun

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