79. Show that SSE Syy 1Sxy, which gives an alternative computational formula for SSE....

79. Show that SSE
Syy 
ˆ

1Sxy, which gives an alternative computational formula for SSE.

80. Suppose that x and y are positive variables and that a sample of n pairs results in r
1. If the sample correlation coefficient is computed for the (x, y2

) pairs, will the resulting value also be approximately 1? Explain.