condition mean min max ZT0-3 0.058479025000000004 0.04439565 0.0725624 ZT4-7 0.0442334 0.0442334 0.0442334 ZT8-11 0.13464985 0.13464985 0.13464985 ZT12-15 0 0 0 ZT16-19 0.11643300000000001 0.11643300000000001 0.11643300000000001 ZT20-23 0.10220815000000001 0.10220815000000001 0.10220815000000001