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Basic Question 1 of 22
When constructing confidence intervals for a normally distributed population, the t-distribution is used when ______
B. the sample size is less than 30, regardless of the population standard deviation.
C. the population standard deviation is unknown and the sample size is less than 30.
A. the population standard deviation is known.
B. the sample size is less than 30, regardless of the population standard deviation.
C. the population standard deviation is unknown and the sample size is less than 30.
User Contributed Comments 2
| User | Comment |
|---|---|
| Shaan23 | I guess its the most correct but in the notes it says to use the t-test if the poplulation is normally distributed and the variance unknown IRRESPECTIVE of sample size. |
| praj24 | If we know the population SD then we're able to find the population variance. Hence, C. |
I am using your study notes and I know of at least 5 other friends of mine who used it and passed the exam last Dec. Keep up your great work!
Barnes
Learning Outcome Statements
calculate and interpret a confidence interval for a population mean, given a normal distribution with 1) a known population variance, 2) an unknown population variance, or 3) an unknown population variance and a large sample size;
CFA® 2024 Level I Curriculum, Volume 1, Module 5.