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🧹 Topic 04: Data Cleaning & Preparation — Data Ko Saaf Karo!

Overview
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🧹 Topic 04: Data Cleaning & Preparation — Data Ko Saaf Karo! — Quick Facts

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Z: 3 = outlier!

Topic 1
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P12: Data Analysis & Interpretation — Data Se Decision Lo!

📊 Aliens School — Skill Library (HIEN Edition) "Data scientists spend 80% of their time…
Topic 2
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📌 Is Topic Me Kya Hai?

💾 ` ┌─────────────────────────────────────────────────┐ │ TOPIC 04: DATA CLEANING &…
Topic 3
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⚠️ Why Data Cleaning Matters

🗄️ ` DIRTY DATA = WRONG DECISIONS! ════════════════════════════ STATS: → Data scientists…
Topic 4
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🐛 Common Data Problems

📈 ` 7 COMMON DATA PROBLEMS! ═════════════════════ 1. MISSING VALUES: → Empty cells / NULL!…
Topic 5
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🔧 Handling Missing Values

🔍 ` MISSING VALUE STRATEGIES! ════════════════════════ STRATEGY 1: DELETE → Remove rows…
Topic 6
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🔄 Handling Duplicates

📉 ` DUPLICATE REMOVAL! ═════════════════ HOW TO FIND DUPLICATES: → Excel: Data → Remove…
Topic 7
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📐 Data Standardization

🧮 ` STANDARDIZE FOR CONSISTENCY! ═══════════════════════════ TEXT STANDARDIZATION: →…
Topic 8
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📊 Outlier Detection

🌐 ` OUTLIERS = EXTREME VALUES! ═════════════════════════ DETECTION METHODS: 1. VISUAL: →…
Topic 9
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✅ Data Quality Framework

📊 ` DATA QUALITY = ACCURACY FRAMEWORK! ═════════════════════════════════ A — ACCURATE (Sahi…
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🔑 KEY POINTS — 10 Takeaways!

💾 ` ╔══════════════════════════════════════════════════════════════╗ ║ 📌 KEY POINTS — TOPIC…
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💪 Exercises

🗄️ Exercise 1: Clean This Data Neeche diya hua dataset Excel/Sheets me create karo aur clean…
Topic 12
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📚 Cross-References

📈 ` 📚 Related Topics: → Topic 02: Data Types — Understanding data structure! → Topic 05:…
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