Nous sommes "it"

Sieglinde comes out of hiding, announcing herself with a new design and a tag. The game: pick up the nearest book, turn to page 123, and copy the 5th, 6th and 7th sentences. The result:

"Thus the R² also can be expressed as one minus the ratio of the sum of squared residuals to the total sum of squares:

R² = 1 - (SSR/TSS).

Finally, the R² of the regression of Y on the single regressor X is the square of the correlation coefficient between Y and X. The R² ranges between zero and one."

That's from a swell read entitled Introduction to Econometrics, by James H. Stock and Mark W. Watson.

I tag Maury, Chalkenteros, and Mr. Patrick J. Smith.