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Basic Question 1 of 3
The standard deviation, σ(x-bar1 - x-bar2), of the sampling distribution is also referred to as the ______.
B. variance
C. standard error
A. mean
B. variance
C. standard error
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 |
I passed! I did not get a chance to tell you before the exam - but your site was excellent. I will definitely take it next year for Level II.
Tamara Schultz
Learning Outcome Statements
construct hypothesis tests and determine their statistical significance, the associated Type I and Type II errors, and power of the test given a significance level
CFA® 2025 Level I Curriculum, Volume 1, Module 8.