addition of unit 1 3 4 5

unit 5/05_Applications_and_Impact.md

@@ -0,0 +1,22 @@
+# Applications and Social Impact
+
+## Applications of Data Mining
+Data mining is used everywhere!
+
+1. **Healthcare**: Predicting diseases, finding side effects of drugs.
+2. **Retail (Market Basket Analysis)**: Placing Bread near Butter to increase sales.
+3. **Finance**: Detecting credit card fraud, approving loans.
+4. **Education**: Tracking student performance to help them improve.
+5. **Crime**: Identifying crime hotspots and predicting criminal behavior.
+
+## Social Impact and Issues
+
+### Positive Impact
+- **Convenience**: Personalized recommendations save time.
+- **Safety**: Fraud detection and medical diagnosis save money and lives.
+
+### Negative Impact (Ethical Issues)
+1. **Privacy Invasion**: Companies know too much about you.
+2. **Discrimination**: Profiling can lead to unfair treatment (e.g., denying loans based on where you live).
+3. **Security**: Large databases can be hacked (Data Breaches).
+4. **Manipulation**: Targeted ads can influence your behavior or political views.