This is Dataplot data file NATR1219.DAT
Effect of laundering on fire-retardant treatments for fabrics
Goal: Determine the effect of laundering on fire-retardant
treatments
2**(4-1) fractional factorial experiment (part of a larger experiment)
Source--Natella, Mary G. (1963). Experimental Statistics.
National Bureau of Standards Handbook 91.
U.S. Government Printing Office. Page 12-19
Number of observations = 8
Total number of variables per line image = 5
Order of variables on a line image--
Response variable = inches burned
Factor 1 = Fabric (2 levels, -1 = Sateen, 1 = Monks Cloth)
Factor 2 = Treatment (2 levels, -1 = Treatment x, 1 = Treatment Y)
Factor 3 = Laundering condition (2 levels, -1 = Before laundering,
1 = after one laundering)
Factor 4 = Direction of test (2 levels, -1 = Warp, 1 = Fill)
To read this file into Dataplot--
SKIP 25
READ NATR1219.DAT Y X1 X2 X3 X4
Y X1 X2 X3 X4
Inches Laundering
Burned Fabric Treatment Condition Direction
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4.2 -1 -1 -1 -1
4.0 +1 +1 -1 -1
5.0 +1 -1 +1 -1
4.6 -1 +1 +1 -1
3.0 +1 -1 -1 +1
2.8 -1 +1 -1 +1
2.9 -1 -1 +1 +1
2.3 +1 +1 +1 +1