#PLOTDOUB
LABELS:	X = 							
		Z=

unstandardized b for x 		

unstandardized b for z 		
unstandardized b for xz  
  (interaction term)		

mean of x  		

mean of z 		

std dev for x 		

std dev for z 		

std dev for y		

constant 		
variance of x with x  
 ( from bcov matrix)		
covariance of x with xz 
 (from bcov matrix) 		
variance of xz with xz  
 (from bcov matrix)