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Misal kita menyelidiki hasil panen padi dari 300 orang petani di suatu daerah. Dari hasil penyelidikan tersebut kita ketahui bahwa hasil panen rata-rata 50 Kw

Misal kita menyelidiki hasil panen padi dari 300 orang petani di suatu daerah. Dari hasil penyelidikan tersebut kita ketahui bahwa hasil panen rata-rata 50 Kw dengan Deviasi Standar 10 Kw. Seandainya hasil panen mendekati Distribusi Normal. Ditanyakan: Berapa % petani hasil panennya 75 Kw atau lebih? Berapa % petani yang hasil panennya 35 Kw atau kurang?

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