- CFA Exams
- CFA Level I Exam
- Topic 1. Quantitative Methods
- Learning Module 7. Estimation and Inference
- Subject 2. The Central Limit Theorem and Inference
CFA Practice Question
A population is known to have a left skewed distribution with a mean of 400 and a standard deviation of 25. If a sample size of 50 is drawn at random from the population, the sampling distribution of the mean x-bar will be ______.
A. left skewed with a mean of 400
B. normally distributed with a mean of 400
C. left-skewed with a standard deviation of 25
User Contributed Comments 5
| User | Comment |
|---|---|
| danlan | It's because of the central limit theorem |
| samerthehammer | Becauase the sample size is more than 30. |
| zzhumanov | All, sample with size 50 is drawn from population. it's means population more that 50, but it's left skewed. my question, can we assume if sample size >30 it's normal distribution? |
| sh21 | @ zzhmanov's question: yea, i would want to know that too |
| ColonelCFA | Yes anything greater than 30 can be assumed to approach a normal distribution. |