condition mean min max ZT0-3 0.0162607 0.0 0.0325214 ZT4-7 0.0496611 0.0496611 0.0496611 ZT8-11 0.01607315 0.01607315 0.01607315 ZT12-15 0 0 0 ZT16-19 0.0160189 0.0160189 0.0160189 ZT20-23 0.032001 0.032001 0.032001