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Pertemuan 3 Eksplorasi Data Berpasangan

Pertemuan 3 Eksplorasi Data Berpasangan. Prof. Dr. Ir. Loekito Adi Soehono , M.Agr. 3. Eksplorasi data berpasangan. Scatterplots Pearson Correlation Rank Correlation Serial Correlation. 3.1. Scatterplot Diagram. 3.2. Pearson Correlation.

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Pertemuan 3 Eksplorasi Data Berpasangan

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  1. Pertemuan 3Eksplorasi Data Berpasangan Prof. Dr. Ir. LoekitoAdiSoehono, M.Agr

  2. 3. Eksplorasi data berpasangan • Scatterplots • Pearson Correlation • Rank Correlation • Serial Correlation

  3. 3.1. Scatterplot Diagram

  4. 3.2. Pearson Correlation Analisis Korelasi : menyelidiki ada tidaknya hubungan dua peubah atau lebih Koefisien korelasi : untuk mengukur tingginya derajad hubungan Korelasi linier : hubungan peubah acak X dan Y yang membentuk garis lurus Arah hubungan eubah dapat bernilai positif atau negatif Koefisien korelasi populasi : Koefisien korelasi sampel :

  5. X : suhu rata-rata Y : RH rata-rata rxy : - 0,53 Hubunganantara X dan Y negatif Jika X naikmaka Y turun

  6. 3.3. Rank Correlation • Korelasi antar peubah yang disusun berurut (rank) • rrank = 1- [6  di2] / [n(n2-1)]

  7. 3.4. Serial Correlation • Korelasi untuk data time series • Korelasi antara data ke-t dengan data ke t-k • Misal : korelasi antara curah hujan bulan berjalan dengan curah hujan sebelumnya (ryt yt-1) atau r1 (k=1 atau lag =1)

  8. 3.4. Serial Correlation (ryt yt-1) =0.37

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