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We have calculated a confidence interval based upon a sample of n = 200. Now we want to get a better estimate W with a margin of error only one fifth as large. We need a new sample with n at least​
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We have calculated a confidence interval based upon a sample of n = 200. Now we want to get a better estimate W with a margin of error only one fifth as large. We need a new sample with n at least​

User Yodalr
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Answer:

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40

User Maxim Veksler
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