Update README.md

README.md

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   - split: augmented
     path: data/augmented-*
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+
+## Dataset Summary
+This dataset records **daily electronic device usage** and **sleep patterns** of students.  
+It is designed for exploring the relationship between screen time, device behavior, and **average sleep duration**.
+
+- **Original size:** 30 samples  
+- **Augmented size:** 300 samples  
+- **Task type:** Regression (predicting daily sleep hours)  
+- **Goal:** Predict `sleep_hours` from usage and sleep-related features  
+
+---
+
+## Data Splits
+- No fixed train/test split is provided.  
+- Users can apply their own strategy (e.g., 80/20 split).  
+
+---
+
+## Intended Uses
+- **Regression Task:** Predict `sleep_hours` from device usage.  
+- **Correlation Analysis:** Study relationships between screen time and sleep quality.  
+- **Education:** Demonstrates dataset augmentation (30 → 300 samples).  
+
+---