Exam PA · Predictive Analytics Problem Definition · Free Lesson

Explain the concepts of bias, variance, model complexity, and the bias-variance trade-off.

Free SOA Exam PA (Predictive Analytics) lesson in Predictive Analytics Problem Definition. 8 min read, ~1,185 words.

Bias. Bias is the error baked into a model by wrong or overly simple assumptions. A linear model forced onto a curved truth is biased no matter how much data you feed it. High bias means underfitting: the model is too rigid to capture the real relationship.

Read the full lesson, free →

Worked examples and practice. Free with a free account, no card.

What this lesson covers

Content
Example 1
Example 2
Common Mistakes
Check Your Understanding
Bottom Line
Exam Shortcuts

Learning objectives

Browse all free Exam PA lessons or jump into free Exam PA practice questions.