Project: The End-to-End Prediction App

Congratulations. You have reached **Day 150**.

You've gone from writing `SELECT *` to building intelligent systems that learn from data. Today, we put it all together.

The Grand Challenge: Predicting Customer Churn

1. **The SQL**: Pull a dataset of customers, their tenure, and their spend.

2. **The Wrangling**: Handle missing data and engineer a `is_active_last_month` feature.

3. **The EDA**: Visualize the correlation between "Support Calls" and "Churn."

4. **The ML**: Build a Logistic Regression model to predict who will leave next month.

5. **The Conclusion**: Generate a list of "High Risk" customers for the marketing team.

**Days 1-100**: You mastered the language of data (SQL).

**Days 101-125**: You mastered the processing of data (Pandas).

**Days 126-140**: You mastered the storytelling of data (Visualization).

**Days 141-150**: You mastered the intelligence of data (Machine Learning).

The world of data never stops moving. Keep building projects, keep asking "Why?", and never stop learning.

**You are no longer a student. You are a Data Scientist.**

Thank you for joining the 150 Days of Mastery.