Question: Construct a 98% confi dence interval for the average value of y for Problem 12.8; use x 20. Construct a 98% prediction interval for a

Construct a 98% confi dence interval for the average value of y for Problem 12.8; use x 20. Construct a 98% prediction interval for a single value of y for Problem 12.8; use x 20. Which is wider? Why?

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