- CFA Exams
- CFA Exam: Level I 2021
- Study Session 3. Quantitative Methods (2)
- Reading 11. Hypothesis Testing
- Subject 8. Hypothesis Tests Concerning the Mean: T-Test vs. Z-Test

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**CFA Practice Question**

A z-test is sometimes used instead of a t-test when ______

B. the test concerns a mean and sample size is large.

C. the test concerns the standard deviation and the sample size is unknown.

A. the test concerns a parameter not based on specific distributional assumptions.

B. the test concerns a mean and sample size is large.

C. the test concerns the standard deviation and the sample size is unknown.

Correct Answer: B

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