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Evergreens is an American Pharmacy. They have become concerned that they are losing business to online...

Evergreens is an American Pharmacy. They have become concerned that they are losing business to online pharmacies. They conduct a phone survey where they ask participants if they use online Pharmacies. 25/125 of the people responded yes.  

Give the margin of error for the 95% interval estimate for the proportion of people who use an online pharmacy.

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