condition mean min max ZT0-3 0.0244165 0.0244001 0.0244329 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0746135 0.0746135 0.0746135 ZT12-15 0 0 0 ZT16-19 0.09617455 0.09617455 0.09617455 ZT20-23 0.0240634 0.0240634 0.0240634