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Untuk mengetahui penghasilan rata-rata tukang becak, dilakukan pengambilan sampel 20 orang dan menghasilkan rata-rata sampel Rp.12.500,- dan standar deviasi Rp. 2.000,-. Dengan confidence level 95%,

Untuk mengetahui penghasilan rata-rata tukang becak, dilakukan pengambilan sampel 20 orang dan menghasilkan rata-rata sampel Rp.12.500,- dan standar deviasi Rp. 2.000,-. Dengan confidence level 95%, berapakah estimasi interval rata-rata penghasilan tukang becak per hari

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