Table A-7. Statistical comparison (t-test) of mean densities of unionids among three sites in Reach 1 5 of the 

 Upper Mississippi River, 1994-95. Statistically significant differences are denoted by the level of 

 significance and the relationship (> or <) of mean densities. 



Reach 15 - 1994-95 



Page A-6 



Whitney et al., Unionid Sun-ey - Reach 1 5 UMR 



