7 varians - kelompok
DESCRIPTION
STATISTIK DESKRIPTIFTRANSCRIPT
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VARIANS DATA KELOMPOK
1.EVA DWI JAYANTI (131014034)
2.DWI PUTRI (131014035)
3.ERICHA SHOLEHA (131014045)
4.WINDA WARDIATI (131014074)
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PENGERTIAN VARIANSVARIANS ATAU VARIANSI MERUPAKAN
JUMLAH KUADRAT SEMUA DEVIASI NILAI-NILAI INDIVIDUAL TERHADAP RATA-RATA
KELOMPOK
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RUMUS VARIANS DATA KELOMPOK
Untuk Sampel Besar n>30
• S = ²
Untuk Sampel Kecil n<30
• S = ²
Keterangan:S ² = variansF = frekuensiX = nilai tengah kelompokx₁ = rata-rata nilai tengah kelompokn = jumlah data
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TABEL DISTRIBUSI FREKUENSI
Nilai Interval Frekuensi Frekuensi Kumulatif
Nilai Tengah F ( x - x₁)²
60 – 64 2 2 62 450
65 – 65 6 8 67 600
70 – 74 14 22 72 350
75 – 79 15 37 77 0
80 – 84 16 53 82 400
85 – 89 7 60 87 700
90 – 94 5 65 92 1125
Jumlah 65 539 3625
Rata-rata 77
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VARIANS DARI TABEL DI ATASS = ²
S² = = 55, 77
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