This question is about correlation and regression. i conducted the regression answer was 22. before that i conducted 2 other regression which were...

This question is about correlation and regression. i conducted the regression answer was 22.07. before that i conducted 2 other regression which were 60.9 and 157.63. What is the best predictor of your X-measurement's mean? Conduct another regression. Note the finding. Explain why this interesting outcome occurs only for the mean of the X measurement