Question: We have calculated a confidence interval based on a sample of size n=171. If we want to have a new margin of error that is

We have calculated a confidence interval based on a sample of size n=171. If we want to have a new margin of error that is only half of the original size (i.e., Mnew-0.5*Mold), we need to change the sample size to ________. Assume that the other quantities are not affected by the change of the sample size).

what do we need to change the sample size to. explain your answer

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