ASQ
CQE · Question #117
Given that the population standard deviation is 6.8, what sample size is required to be 90% confident that the estimated mean has an error less than 0.02?
The correct answer is A. 312,761. See the full explanation below for the reasoning.
Statistical Tools and Techniques
Question
Given that the population standard deviation is 6.8, what sample size is required to be 90% confident that the estimated mean has an error less than 0.02?
Options
- A312,761
- B189,859
- C175,987
- D152,083
How the community answered
(30 responses)- A70% (21)
- B17% (5)
- C10% (3)
- D3% (1)
Topics
#sample size determination#confidence interval#z-distribution#margin of error
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