AP Statistics Question (This was on one of my class tests)

Calculus
Thu, 08 Feb 2007 15:46:59 +0000

The standard deviation of a line with the points unchanging is 0. y(bar)=1 and all y-values =1. So plug that into the correlation formula of the y-values, (y-(y-bar))/Sy.

(1-1)/0, now you don’t even need the x-part or the degrees of freedom, it’s undefined.