Table A-11. Statistical comparison (t-test) of mean densities of unionids at Case-IH (RM 488.5) between 

 1985, 1987, and 1994. Statistically significant differences are denoted by the level of 

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



PageA-10 



Whitney et al., Unionid Survey - Reach 15 UMR 



