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⇱ Improve Accuracy with ML Ensemble Methods | Coursera


Improve Accuracy with ML Ensemble Methods

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Improve Accuracy with ML Ensemble Methods

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Gain insight into a topic and learn the fundamentals.
Intermediate level

Recommended experience

4 hours to complete
Flexible schedule
Learn at your own pace

Gain insight into a topic and learn the fundamentals.
Intermediate level

Recommended experience

4 hours to complete
Flexible schedule
Learn at your own pace

What you'll learn

  • Explain the core principles of ensemble learning and describe when and why combining diverse models improves predictive accuracy.

  • Implement bagging and boosting algorithms in Java within a Jupyter Notebook, tuning key parameters for optimal performance.

  • Build, tune, and evaluate random forest models for classification and regression, interpret features, and compare results with ensemble methods.

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Recently updated!

December 2025

Assessments

1 assignment¹

AI Graded see disclaimer
Taught in English

Build your subject-matter expertise

This course is part of the Level Up: Java-Powered Machine Learning Specialization
When you enroll in this course, you'll also be enrolled in this Specialization.
  • Learn new concepts from industry experts
  • Gain a foundational understanding of a subject or tool
  • Develop job-relevant skills with hands-on projects
  • Earn a shareable career certificate

There are 3 modules in this course

Improve the accuracy and reliability of your machine learning models by mastering ensemble techniques. In this intermediate-level course, you’ll learn why combining multiple models can outperform any single algorithm and how to design, select, and apply the right ensemble approach for different tasks. You’ll work through three core ensemble methods—bagging, boosting, and random forests—using Java in a Jupyter Notebook environment. Starting with the fundamentals of decision trees, you’ll progress from theory to practice, exploring bootstrap sampling, hard/soft voting, and the bias–variance trade-offs that influence ensemble performance. Each lesson combines focused videos, scenario-based discussions, AI-graded labs, and a capstone project, guiding you to build and evaluate ensembles on real datasets.

This course is for aspiring data scientists, ML engineers, and Java developers who want to enhance their predictive modeling skills using industry-standard ensemble techniques applied at companies like Netflix, Airbnb, and in Kaggle competitions. Learners should have basic Java programming knowledge, familiarity with machine learning fundamentals (supervised learning, train/test splits, evaluation metrics), and comfort using Jupyter Notebook. By the end, you’ll be able to implement, tune, and critically assess which ensemble method is most appropriate for a given problem, equipping you with practical, job-ready skills to improve predictive accuracy.

This module explains the core idea behind ensemble learning—combining multiple models to achieve higher predictive accuracy and stability than any single model. Learners explore how ensembles reduce bias and variance, review real-world use cases, and implement voting classifiers to see the performance gains firsthand.

What's included

4 videos2 readings1 peer review

4 videosTotal 24 minutes
  • Welcome to Improve Accuracy with ML Ensemble Methods2 minutes
  • Core Principles of Ensemble Learning5 minutes
  • Practical Success Stories with Ensembles7 minutes
  • Building Voting Classifiers in Java with Jupyter10 minutes
2 readingsTotal 10 minutes
  • Welcome to the Course: Course Overview5 minutes
  • Ensemble Learning: Concepts and Benefits5 minutes
1 peer reviewTotal 20 minutes
  • Hands-On-Learning: Build and Compare Voting Classifiers20 minutes

This module teaches how to increase model accuracy by reducing variance with bagging and reducing bias with boosting. Learners practice bootstrap sampling, implement bagging in Java using Jupyter, and build a boosting model including AdaBoost to see how sequential learning corrects errors.

What's included

3 videos1 reading1 peer review

3 videosTotal 21 minutes
  • Why Bootstrapping Matters for Ensemble Learning6 minutes
  • How Bagging Builds Stability in Models7 minutes
  • Turning Errors into Accuracy: Boosting with AdaBoost7 minutes
1 readingTotal 5 minutes
  • Choosing the Right Ensemble: Bagging vs. Boosting5 minutes
1 peer reviewTotal 20 minutes
  • Hands-On-Learning: Comparing Bagging and Boosting for Credit Risk Prediction20 minutes

This module covers decision tree fundamentals and shows how random forests combine many trees through feature bagging and averaging to create powerful, stable predictors. Learners build, tune, and evaluate random forest models in Java, interpreting feature importance and comparing results to single-tree models.

What's included

4 videos1 reading1 assignment2 peer reviews

4 videosTotal 30 minutes
  • The Mechanics of Decision Trees10 minutes
  • How Bagging and Boosting Improve Tree Models10 minutes
  • Building Smarter Ensembles with Random Forests8 minutes
  • Course Wrap-Up2 minutes
1 readingTotal 5 minutes
  • How Decision Trees Split Data: A Guided Walkthrough5 minutes
1 assignmentTotal 20 minutes
  • Improve Accuracy with ML Ensemble Methods20 minutes
2 peer reviewsTotal 80 minutes
  • Hands-On-Learning: Decision Trees vs Random Forests for Predictive Maintenance20 minutes
  • Project: Building Reliable Ensemble Models for RetailGuard Analytics 60 minutes

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¹ Some assignments in this course are AI-graded. For these assignments, your data will be used in accordance with Coursera's Privacy Notice.