RAT 6.1: Robust Against Trends Program
(c) 2009 Design Computing (designcomputing.net/)

Note: Best design for m=3, p=8 and n=15.

try #     	3
seed      	1420395254
# of iterations	4
f         	0
det       	1.13246208E9
std. det  	0.44186905
TF        	1

Factor levels (columns 2-4):

-1	-1	-1	-1	
-1	-1	-1	1	
-1	-1	1	1	
-0.5	-1	1	-1	
-0.5	1	-1	-1	
-0.5	1	-1	1	
0	1	1	-1	
0	1	1	-1	
0	1	1	1	
0.5	-1	1	-1	
0.5	1	-1	-1	
0.5	1	-1	1	
1	-1	-1	-1	
1	-1	-1	1	
1	-1	1	1	

X'X

7.5	0	0	0	0	0	0	0	
	15	-1	-1	-1	-1	-1	-1	
		15	-1	-1	-1	-1	-1	
			15	-1	-1	-1	-1	
				15	-1	-1	-1	
					15	-1	-1	
						15	-1	
							15	

inverse(X'X)

0.1333	-0	-0	-0	-0	-0	-0	-0	
	0.0694	0.0069	0.0069	0.0069	0.0069	0.0069	0.0069	
		0.0694	0.0069	0.0069	0.0069	0.0069	0.0069	
			0.0694	0.0069	0.0069	0.0069	0.0069	
				0.0694	0.0069	0.0069	0.0069	
					0.0694	0.0069	0.0069	
						0.0694	0.0069	
							0.0694	

Note: RAT used 0.0 seconds.