Posted by **Anonymous** on Wednesday, March 27, 2013 at 9:40am.

The scatter diagram of midterm scores and final scores in a large class is football shaped. For about 80% of the students, the regression estimate of final score based on midterm score is correct to within 15 points. For about 95% of the students, the regression estimate of final score based on midterm score is correct to within how many points?

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