Full Text CEPIS/OPS/OMS

Table IV - Means and Analysis of variance for Physical Test data on
Leathers from Preservation Tests I and II

                                    Tensile              SATRA           SATRA
                                    Strength            Extension        Load 
                                    (P.s.i.)             (mm.)           (Kg.)


 Preservation  I                      
 Means                                
   Sulfite                           3510                 9.61            203      
   Control                           3282                 9.00            244      
 Analysis of Variance               
   Sum of squares between means    312512                 2.25          10211        
   Degrees of freedom                   1                 1                 1        
   Error                               22                 22               22      
   F value                              0.877             0.768             0.662  

 Preservation II 
 Means                     
   Sulfite                           2562                 9.43            161     
   Control                           2383                 8.79            154     
 Analysis of Variance                                                              
   Sum of squares between means    144032                 1.83            221     
   Degrees of freedom                   1                 1                 1     
   Error                               16                16                16     
   F value                              0.567             1.964             0.104
An F value of 4.48 or greater indicates that the difference between the means is significant at the 95 percent confidence level.

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