ASQ Exam CSSBB Topic 7 Question 109 Discussion

Actual exam question for ASQ's CSSBB exam

Question #: 109
Topic #: 7

Samples of size n=36 are randomly selected from a population with mean = 125 and variance 12. Find the variance of the distribution of sample means.

A.333

B.577

D3.464

E12

Show Suggested Answer

Suggested Answer: B

by Reta at Mar 18, 2025, 11:02 AM

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Lashunda

8 days ago

Hmm, let's see. If the population has a mean of 125 and a variance of 12, and we're taking samples of size 36, the variance of the sample means should be the population variance divided by the sample size, right? That would make it 12/36 = 0.333. I'm going with A).

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