- CFA Exams
- CFA Level I Exam
- Topic 1. Quantitative Methods
- Learning Module 9. Parametric and Non-Parametric Tests of Independence
- Subject 2. Test of Independence Using Contingency Table Data

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**CFA Practice Question**

Suppose a study of speeding violations and drivers who use cell phones produced the following fictional data:

The probability that a person is a car phone user GIVEN a person had a violation in the last year is:

A. 25/70

B. 25/755

C. 25/305

**Explanation:**The sample space is reduced to the number of persons who had a violation.

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