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Select all the statements that are true of a least-squares regression line. 1. R2 measures how...

Select all the statements that are true of a least-squares regression line.

1. R2 measures how much of the variation in Y is explained by X in the estimated linear regression.

2.The regression line maximizes the residuals between the observed values and the predicted values.

3.The slope of the regression line is resistant to outliers.

4.The sum of the squares of the residuals is the smallest sum possible.

5.In the equation of the least-squares regression line, Y^ is a predicted value when X is known.

6. The regression line is used to predict Y from any value of X.

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