Question: A regression line for predicting test scores has an r.m.s. error of 8 points. (a) About 68% of the time, the predictions will be right

A regression line for predicting test scores has an r.m.s. error of 8 points.

(a) About 68% of the time, the predictions will be right to within ___ points.

(b) About 95% of the time, the predictions will be right to within ___ points. pl875

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