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Say you have data on the number of piercings a person has for 100,000 residents of...

Say you have data on the number of piercings a person has for 100,000 residents of the U.S. You want to estimate a 80% prediction interval, that is an interval that would estimate the range of piercings for the middle 80%. The data is not normal. Without transforming or manipulating the data in any way, how could you estimate a 80% prediction interval?

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