- CFA Exams
- CFA Level I Exam
- Topic 1. Quantitative Methods
- Learning Module 6. Hypothesis Testing
- Subject 2. Null Hypothesis and Alternative Hypothesis

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**CFA Practice Question**

A researcher is seeking to prove that the mean number of teenagers who will start smoking this year is less than the mean number of teenagers who started smoking last year. What type of test should he/she use?

B. one-tailed test

C. alternative hypothesis

A. two-tailed test

B. one-tailed test

C. alternative hypothesis

Correct Answer: B

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**User Contributed Comments**
2

User |
Comment |
---|---|

nufan |
B is right because "is less than the mean" = one-tailed test |

got2pass |
less than or greater than would use the one-tailed test |