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We have calculated a confidence interval based on a sample of size n = 100. Now we want to get a better estimate with a

We have calculated a confidence interval based on a sample of size n = 100. Now we want to get a better estimate with a margin of error that is only one fourth as large. How large does our new sample need to be? (a) 25 (b) 50 (c) 400 (d) 800 e)1600

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