- CFA Exams
- CFA Level I Exam
- Topic 1. Quantitative Methods
- Learning Module 5. Sampling and Estimation
- Subject 7. Data Snooping Bias, Sample Selection Bias, Look-Ahead Bias, and Time-Period Bias
CFA Practice Question
Symptoms of data mining include ______.
II. use of certain words in the study such as "we noted" or "we noticed"
III. research with slight variations from prior studies
I. excessive numbers of variables
II. use of certain words in the study such as "we noted" or "we noticed"
III. research with slight variations from prior studies
Correct Answer: I, II and III
These are all indications that the researchers may have succumbed to data mining.
User Contributed Comments 4
| User | Comment |
|---|---|
| duongth307 | Can anyone explain why I is correct? Thanks. |
| jgraham6 | using a bunch of different variables helps "create" more opportunities of "being right." the more variables that are recognized the more relationships can be fabricated or overemphasized as have a significant impact when in actuality they do not |
| dcfa | I think II is normal to have as a result of research/study? |
| schweitzdm | Yes II is correct according to CFAI reading on this topic. Page 561 of Quant book, first bullet point. |