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Exam CQE topic 1 question 97 discussion

Actual exam question from ASQ's CQE
Question #: 97
Topic #: 1
[All CQE Questions]

Periodically, a sample of 20 items are randomly selected from a population that is normally distributed, the average is computed, and plotted. Which of the following statements is correct?
I. The average of the logarithms of the values is lognormally distributed.
II. The standard deviation of the averages is equal to the standard deviation of the individuals divided by the square root of 20.
III. The variance of the averages is equal to the variance of the individuals divided by the square root of 20.

  • A. I only
  • B. II only
  • C. I and II only
  • D. I and III only B
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Suggested Answer: Explanation 🗳️
by adance1 at Aug. 21, 2020, 6:42 p.m.

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jdubiota
1 week, 1 day ago
Selected Answer: B
acceptable
upvoted 1 times
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adance1
4 years, 3 months ago
Thwe average of the logarithms of the values is lo-normally distributed, andthe variance of the average is equal to the variance of the individuals divide by the square root of 20
upvoted 1 times
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