Table 3-3 



Results of Statistical Testing for Significant Differences in 



Chemical Concentrations in Sediment Collected 



at New London, July 1987 









Variable 























% Total 



Station 



Hg 



Pb 



As 



Fe 



Cd 



Cu 



Carbon 



CTR 



na 



ns 



ns 



ns 



na 



ns 



ns 



800SE 



ns 



ns 



ns 



ns 



na 



ns 



ns 



1500NW 



ns 



ns 



ns 



ns 



na 



ns 



ns 



400NW 



na 



ns 



- 



ns 



na 



- 



ns 



400SE 



ns 



+ 



+ 



+ 



na 



+ 



+ 



+ = concentrations significantly higher than Reference 

 station (p < 0.05, Mann-Whitney U-test) 



- = concentrations significantly less than Reference 

 station (p < 0.05, Mann-Whitney U-test) 



ns = not significantly different from Reference station 

 (p > 0.05, Mann-Whitney U-test) 



na = statistical test not applicable because chemical 



concentrations were below detection limits in some or 

 all replicates 



