[Steps Shown] A random sample of 19,600 people in the United States was selected, and each person was offered one hundred dollars if he could wiggle his ears.
Question: A random sample of 19,600 people in the United States was selected, and each person was offered one hundred dollars if he could wiggle his ears. Only 392 people were able to perform that feat.
Find a 95%-confidence interval for the percentage of people in the United States who can wiggle their ears. (Assume that the sample is sufficiently large that a normal approximation is applicable.)
Deliverable: Word Document 
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