Practical Data Science using Python - Decision Tree - Iris Dataset Case Study

The video tutorial explains decision trees using the iris dataset, covering data preparation, exploratory data analysis, model building, and evaluation. It highlights the issue of overfitting and demonstrates how to visualize the decision tree using Graphviz. The tutorial provides a comprehensive understanding of decision trees, including the importance of train-test split and the interpretation of confusion matrices.

What is overfitting in the context of decision trees, and how does it affect model performance?

Explain the role of the confusion matrix in evaluating the decision tree model.

What steps can be taken to address the overfitting problem in decision trees?

How does the Gini index relate to the decision tree's splitting criteria?