Which of the statements below best describes the meaning of residuals?
a) a linear equation of the least squares regression line
b) the y-intercept of the least squares regression line
c) the distance each point is from the least squares regression line
d) the slope of the least squares regression line

The best and most correct answer among the choices provided by your question is the third choice or letter C " the distance each point is from the least squares regression line."

A residual is the difference between the observed y-value (from scatter plot) and the predicted y-value (from regression equation line). It is the vertical distance from the actual plotted point to the point on the regression line.

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