o 



LU 



o 



LU 

 QC 

 LU 

 LI. 



LU 

 _l 

 CD 

 < 



H 

 O 

 LU 



I- 

 LU 

 O 



550 



500- 



450 



400 



350- 



300 



it 250- 



200 



150- 



100- 



50 - 



4 6 8 10 12 



NUMBER OF REPLICATES 



14 



16 



Reference: Tetra Tecti (1986b) 



Figure E-i Minimum detectable difference versus number of replicates 

 at selected levels of unexplained variance for 4 and 6 

 stations. Power of test = 0.80, significance level = 0.05. 



