OBSP Statistical Summary for BENZENE

Spike Level	Range	N	Mean	Std-Dev.	Median	F_Pseudo
ULTRA-LOW	0.01-0.155	40	98%	12%	99%	13%
LOW	0.155-0.5	32	102%	14%	104%	7%
MEDIUM	0.5-2.5	13	104%	9%	102%	5%
HIGH	2.5-10.0+	4	109%	10%	107%	10%