OBSP Statistical Summary for P,P^-DDE

Spike Level	Range	N	Mean	Std-Dev.	Median	F_Pseudo
ULTRA-LOW	0.005-0.055	30	72%	13%	72%	7%
LOW	0.055-0.155	24	71%	14%	71%	10%
MEDIUM	0.155-0.55	3	71%	10%	67%	14%