biostatistik deskriptif
TRANSCRIPT
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STATISTIK DESKRIPTIFOLEH: SOLIKHAH, S.KM, M.KES
Fakultas Kesehatan Masyarakat UAD
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UKURAN TENDENSI TENGAH
1. Mean/rata-rata
2. Median
3. Modus
Distribusi
data/sebaran
data normal
mean, weighted
mean, median, mode, geometric
mean, and harmonic mean
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lanjutan
Rata-rata tertimbang/weight mean
Contoh: si A mendapatkan skor nilai PR=60, UTS=75, UAS=93,
dan bobot masing2 item adalah sbb PR=10%, UTS=30%, dan UAS=60%
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Diurutkan terlebih dahulu dari angka terkecil
ganjil
Genap diambil rata-ratanya
Dengan mempertimbangkan nilai median
Ada data sebagai berikut:2, 34, 225. hitung nilai rerata menggunakan
geometrik mean
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Ada dua pengukuran sbb: 60km/jam dan 30 km/jam
Hitung nilai rata-rata harmoniknya?
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UKURAN TENDENSI CENTRAL PADA DATA
BERKELOMPOK
Titik tengah kelas
8
38,5
69,5
77,5
Nilai rata-rata
Nilai median
L= limit bawah kelas median
K=jumlah frek.pada kelas median(1/2n)-frek sebelumnya
f-=frek kelas median
d=interval kelas median
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UKURAN PENYEBARAN
range,
variance,
and standard deviation.
Kuartil
Persentil
Koefisien varian
Box and whisker plot
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LANJUTAN
Variance dan SD
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Variance dan SD pada data berkelompok
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SKWEKNESS (KERUNCINGAN DATA )
SK=0, simetris
SK>0, kemencengan positif
SK<0, kemencengan negatif
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Jenis grafik yang memberikan representasi
visual lokasi, variabilitas, dan outlier
Median (Q2)
Kuantil 1 (Q1)
Kuartil 3 (Q3)
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KUARTIL
Membagi bilangan dalam 4 bagian
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Nilai upper Fence Q3+1,5(IQR)
Nilai lower fence Q1-1,5(IQR)
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GAMBARKAN NILAI BOX PLOTNYA?
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