SOLUTION: If it was known that a population of 1000 parts has a standard deviation of 0.02 seconds, what size sample would be required to maintain an error no greater than 0.005 seconds with

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Question 346733: If it was known that a population of 1000 parts has a standard deviation of 0.02 seconds, what size sample would be required to maintain an error no greater than 0.005 seconds with a confident level of 95%?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
If it was known that a population of 1000 parts has a standard deviation of 0.02 seconds, what size sample would be required to maintain an error no greater than 0.005 seconds with a confident level of 95%?
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sqrt(n) = z*s/E
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n = [z*s/E]^2
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n = [1.96*0.02/0.005]^2
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n = [7.84]^2
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n = 61.47
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Round up to n = 62
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Cheers,
Stan H.
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