- CFA Exams
- CFA Level I Exam
- Topic 1. Quantitative Methods
- Learning Module 5. Sampling and Estimation
- Subject 5. Confidence Intervals for the Population Mean and Selection of Sample Size
CFA Practice Question
A t-distribution with 30 d.f. is most similar to a ______ distribution.
B. normal distribution with μ = 0 and σ2 = 29
C. normal distribution with μ = 0 and σ2 = 1
A. normal distribution with μ = 1 and σ2 = 1
B. normal distribution with μ = 0 and σ2 = 29
C. normal distribution with μ = 0 and σ2 = 1
Correct Answer: C
User Contributed Comments 7
| User | Comment |
|---|---|
| gullan | As the df increases to 30, the height of the t-distribution increases to the height of the standard normal distribution(mean=0, variance=1). |
| rfvo | is it not STD DEV =1? |
| Laurier | Standard deviation is the square root of variance; they are both one. |
| johntan1979 | df 30 means sample size is 31. |
| sgossett86 | lol |
| sgossett86 | bro I don't want you managing my portfolio if the square root of one isn't straightforward. |
| ldfrench | LOL, you tell him sgoessett86!!!! |