
Statistik kelas 8
Presentation
•
Mathematics
•
8th Grade
•
Hard
Ismayani Safitri
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8 Slides • 0 Questions
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By Ismayani Safitri
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Kompetensi Inti (KI) 3
Menganalisis data berdasarkan distribusi data, nilai rata-rata, median, modus, dan sebaran data untuk mengambil kesimpulan, membuat keputusan dan membuat prediksi
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Kompetensi Inti (KI)4
Menyajikan dan menyelesaikan masalah yang berkaitan dengan distribusi data, nilai rata-rata, median, modus dan sebaran data untuk mengambil kesimpulan, membuat keputusan dan membuat prediksi
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Rumus mencari mean (nilai rata -rata), median dan modus
Nilai rata - rata = Jumlah semua data : banyak data
Median = Nilai tengah dari data yang sudah urut
Modus = Bilangan yang sering muncul
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Contoh:
Data nilai ulangan matematika 8, 10, 5, 8, 7, 9, 7, 6, 7, 9
tentukan Mean, median dan modus data tersebut !
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Jawab:
Mean = ( 8 +10 +5+ 8 +7 +9 +7 +6 +7 +9) : 10
= 76 : 10
= 7,6
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Median data harus diurutkan dari kecil ke besar
5, 6, 7, 7, 7, 8, 8, 9, 9, 10
ada 10 data (bilangan genap) jadi median terletak di bilangan ke
(10:2) + ( (10:2) +1) = bilangan ke 5 dan 6
median = (7 +8) : 2 = 7,5
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5, 6, 7, 7, 7, 8, 8, 9, 9, 10
bilangan 5, 6 dan 10 ada 1
bilangan 8 dan 9 ada 2
bilangan 7 ada 3
jadi modus adalah 7
By Ismayani Safitri
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