Download - Analisis Regresi Sederhana
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Analisis Regresi Sederhana- Kelompok 8 –
Josua Simanjuntak (140502193)Robbi Ramadhan (140502197)Achmad Tamimi (140502202)
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Pengertian Analisis Regresi dan Korelasi
Merupakan kajian yang membahas hubungan antara variabel satu dengan yang lainnya serta seberapa kuat hubungan antar variabel yang terjadi itu.
Contoh:• Hubungan antara biaya promosi dan jumlah penjualan• Hubungan antara jumlah pupuk yang digunakan dan jumlah hasil panen• Hubungan antara suhu dengan Jumlah Cacat Produksi
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Corak Hubungan Antar Variabel• Hubungan yang berbanding lurus (Bersifat Positif)• Hubungan yang berbanding terbalik (Bersifat Negatif)• Tidak ada hubungan antar variabel
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Hubungan yang Berbanding LurusY
(Jumlah Penjualan)
X(Biaya Promosi)
Perubahan nilai atau jumlah variabel bebas akan mempengaruhi variabel terikat secara searah.
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Hubungan yang Berbanding TerbalikY
(Jumlah Permintaan)
X(Jumlah Permintaan)
Perubahan nilai atau jumlah variabel bebas akan mempengaruhi variabel terikat secara berkebalikan arah.
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Tidak ada Hubungan Antar VariabelY
(Jumlah Permintaan)
X(Jumlah Permintaan)
Perubahan nilai atau jumlah yang terjadi pada variabel bebas tidak mempengaruhi variabel terikat
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Metode Untuk Mengetahui Hubungan Antarvariabel
• Metode Diagram Pencar (Scatter Diagram Method)• Metode Jumlah Kuadrat Terkecil (Least Square
Method)• Metode Tabel Korelasi (Corelation Table Method)
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PT Palo Alto Beverage IndustryPengeluaran Biaya Promosi dan Jumlah Penjualan
Minuman Ringan Merek Rasta-Varia Sepanjang Tahun 1996
Bulan biaya promosi Jumlah penjualan (Dalam Ribuan Krat)
Januari 20 35Februari 25 40Maret 30 45April 35 40Mei 40 50Juni 50 60Juli 55 70Agustus 65 45September 70 70Oktober 75 90November 80 150Desember 85 200
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Metode Diagram Pencar(Scatter Diagram Method)
0 2 4 6 8 10 12 140
50
100
150
200
250
Jumlah Penjualan
Jumlah Penjualan
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Metode jumlah kuadrat kecil (Least Square Method)
Biaya promosi (X)
Jumlah Penjualan (Y)
X2 XY Y’=
20 35 400 70025 40 625 100030 45 900 135035 40 1225 140040 50 1600 200050 60 2500 300055 70 3025 385065 45 4225 292570 70 4900 490075 90 5625 675080 150 6400 1200085 200 7225 17000∑X=630 ∑Y=895 ∑X2=38.650 ∑XY=56.875
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