- CFA Exams
- CFA Level I Exam
- Topic 1. Quantitative Methods
- Learning Module 6. Machine Learning
- Subject 2. Overview of Evaluating ML Algorithm Performance
CFA Practice Question
Although more training samples are added, the validation sample and training sample error rates still fail to converge. This is an indication of high:
A. bias error
B. variance error
C. base error
Explanation: Such a model is unstable. It picks up noise and produce high variance, causing overfitting and high out-of-sample error.
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