- CFA Exams
- 2021 CFA Level I Exam
- Study Session 3. Quantitative Methods (2)
- Reading 11. Hypothesis Testing
- Subject 10. Hypothesis Tests Concerning Mean Differences (Paired Comparisons Test)

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**CFA Practice Question**

The standard deviation, σ(x-bar

B. variance

C. standard error

_{1}- x-bar_{2}), of the sampling distribution is also referred to as the ______.A. mean

B. variance

C. standard error

Correct Answer: C

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**User Contributed Comments**
3

User |
Comment |
---|---|

robkaz |
I thought standard error was sigma divided by square root of n? |

sally |
The standard error of a statistic is the standard deviation of the sampling distribution of that statistic. In this case, the statistic is x-bar1 - x-bar2. What you refered to, robkaz, is the standard error of the mean. |

sgossett86 |
im so mad i want to cry |