- CFA Exams
- CFA Level I Exam
- Topic 1. Quantitative Methods
- Learning Module 7. Estimation and Inference
- Subject 2. The Central Limit Theorem and Inference

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**CFA Practice Question**

An analyst gathers the following information about a sample:

Number of observations: 50

Variance: 32

Mean: 12

Number of observations: 50

Variance: 32

The standard error of the sample mean is closest to ______.

A. 0.6

B. 0.8

C. 0.9

**Explanation:**The standard error of the sample mean is the sample standard deviation (or the population standard deviation if known) divided by the square root of the sample size. In this case, the standard error of the sample mean = 32

^{0.5}/ 50

^{0.5}= 0.80.

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