- CFA Exams
- CFA Level I Exam
- Topic 1. Quantitative Methods
- Learning Module 7. Big Data Projects
- Subject 3. Data Exploration Objectives and Methods
CFA Practice Question
The simplest feature selection method for text data is ______.
B. chi-square test
C. mutual information
A. document frequency
B. chi-square test
C. mutual information
Correct Answer: A
Document frequency is a numerical statistic that is intended to reflect how important/relevant a word is to a document in a collection of documents.
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