condition mean min max ZT0-3 0.29135916666666667 0.236832 0.3949435 ZT4-7 0.11316000000000001 0.11316000000000001 0.11316000000000001 ZT8-11 0.11748735 0.11748735 0.11748735 ZT12-15 0.1006705 0.0 0.201341 ZT16-19 0.07446135000000001 0.07446135000000001 0.07446135000000001 ZT20-23 0.334466 0.334466 0.334466