- 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

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**CFA Practice Question**

A t-distribution with 30 d.f. is most similar to a ______ distribution.

B. normal distribution with μ = 0 and σ

C. normal distribution with μ = 0 and σ

A. normal distribution with μ = 1 and σ

^{2}= 1B. normal distribution with μ = 0 and σ

^{2}= 29C. normal distribution with μ = 0 and σ

^{2}= 1Correct Answer: C

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**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!!!! |