DATA LIST FREE / Surface Brand Treadlif.
BEGIN DATA.
1 1 36
1 1 39
1 1 39
1 1 38
1 2 42
1 2 40
1 2 39
1 2 42
1 3 32
1 3 36
1 3 35
1 3 34
2 1 38
2 1 40
2 1 41
2 1 40
2 2 42
2 2 45
2 2 48
2 2 47
2 3 37
2 3 33
2 3 33
2 3 34
3 1 34
3 1 32
3 1 34
3 1 35
3 2 34
3 2 34
3 2 30
3 2 31
3 3 36
3 3 35
3 3 35
3 3 33
END DATA.

VARIABLE LABELS SURFACE 'Type of Surface' BRAND 'Brand of tire'
                TREADLIF 'Tread life (1000s of miles)'.
VALUE LABELS SURFACE 1 'Asphalt' 2 'Concrete' 3 'Gravel'/
             BRAND 1 'X' 2 'Y' 3 'Z'.
ANOVA /VARIABLES TREADLIF BY SURFACE (1,3) BRAND (1,3)/ Method = experimental .