- CFA Exams
- CFA Level I Exam
- Topic 1. Quantitative Methods
- Learning Module 3. Statistical Measures of Asset Returns
- Subject 2. Measures of Dispersion
CFA Practice Question
Which of the following relationships is always correct?
B. SUM (X - XBAR) = 0
C. SUM ((X - XBAR)2) = 0
D. SUM (X - a) = 0
A. SUM (X) = 0
B. SUM (X - XBAR) = 0
C. SUM ((X - XBAR)2) = 0
D. SUM (X - a) = 0
Correct Answer: B
User Contributed Comments 3
| User | Comment |
|---|---|
| BeeBee | Why is SUM(X-XBAR)=0 and SUM((X-XBAR)square)is not??? |
| DAS11 | when you square a number it can not be negative, therefore the numbers will not sum to 0 |
| leosbar | x-xbar=0 ; 0square=1 |