34b4a3fe78
- Rename 16 worksheet files sesuai konten (ws-01-distorsi-paradigma, dst) - Fix README: chapter titles, folder name, struktur bagian
62 lines
1.9 KiB
Markdown
62 lines
1.9 KiB
Markdown
# WS-13: Preprocessing
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> **Bab Terkait:** Bab 13 — Data Preprocessing
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> **Tujuan:** Menangani missing values, membuat pipeline preprocessing, dan mendeteksi leakage
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> **Referensi:** Lampiran B.13 | Template A.13
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---
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## Latihan 1 — Missing Value Strategy
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**Dataset:** ____________________________________________
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**Persentase missing values:** __________________________
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| Strategi | Rata-rata Setelah | Kesimpulan Perbandingan Berubah? |
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|----------|------------------|-------------------------------|
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| Listwise deletion | | [ ] Ya / [ ] Tidak |
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| Mean imputation | | [ ] Ya / [ ] Tidak |
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| Flag & report | | [ ] Ya / [ ] Tidak |
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**Strategi yang dipilih:** _______________________________
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**Justifikasi:** ________________________________________
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---
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## Latihan 2 — Preprocessing Pipeline
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**Bahasa/tool yang digunakan:** __________________________
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| Step | Operasi | Input | Output | Komentar |
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|------|---------|-------|--------|---------|
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| 1 | Cleaning | | | |
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| 2 | Encoding (jika perlu) | | | |
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| 3 | Normalisasi (jika perlu) | | | |
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| 4 | Feature engineering (jika perlu) | | | |
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**Script/file referensi:** ______________________________
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---
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## Latihan 3 — Leakage Detection
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| Potensi Leakage | Ditemukan? | Perbaikan |
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|----------------|-----------|----------|
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| Test data masuk ke training | [ ] Ya / [ ] Tidak | |
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| Future information di features | [ ] Ya / [ ] Tidak | |
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| Target variable di preprocessing | [ ] Ya / [ ] Tidak | |
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| Normalisasi sebelum split | [ ] Ya / [ ] Tidak | |
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**Kesimpulan leakage check:**
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- [ ] Tidak ada leakage — karena: _______________________
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- [ ] Ada leakage — diperbaiki dengan: ___________________
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---
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## Refleksi
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> *"Jika saya menghapus satu baris data — bisakah saya menjelaskan mengapa, dan apakah orang lain akan setuju?"*
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**Jawaban refleksi:**
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> ___________________________________________________
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---
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<!-- Worksheet dari Bab 13 — Data Preprocessing -->
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