*  washing power experiment;  * chapter 7;
OPTIONS LINESIZE=75;
DATA WASH;
 INPUT A B C Y;
 LINES;
 1 1 1  10.6   
 1 1 2  14.9   
 1 1 3  18.2   
 1 2 1  19.8   
 1 2 2  24.3   
 1 2 3  23.2   
 1 3 1  27.0   
 1 3 2  31.5   
 1 3 3  34.0   
 2 1 1  19.7  
 2 1 2  25.5   
 2 1 3  25.9  
 2 2 1  32.9  
 2 2 2  36.4   
 2 2 3  38.9  
 2 3 1  36.1   
 2 3 2  39.0  
 2 3 3  40.6   
 3 1 1  22.3  
 3 1 2  29.4  
 3 1 3  29.7  
 3 2 1  32.0  
 3 2 2  41.0  
 3 2 3  41.6  
 3 3 1  32.1  
 3 3 2  41.5  
 3 3 3  38.7   
;