Why is the answer 1600

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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 margin of error that is only one fourth as large. How large does our sample need to be?

WHy is the answer 1600? Can someone explain the process please.

Reference no: EM132116890

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Why is the answer 1600 : WHy is the answer 1600? Can someone explain the process please.
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