CFA Practice Question

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CFA Practice Question

What assumption is made when calculating a confidence interval around the mean for a sample with less than 30 data points?

I. The sample is normally distributed.
II. The population from which the sample was taken is normally distributed.
III. The sample standard deviation is equal to the population standard deviation.
Correct Answer: II

User Contributed Comments 2

User Comment
MFTIOA If Nonnormal and small sample, then a confidence interval can't be constructed
ashish100 Thanks MFTIOA! cool name!
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