condition mean min max ZT0-3 0.4059145 0.4059145 0.4059145 ZT4-7 0.6878930000000001 0.6878930000000001 0.6878930000000001 ZT8-11 0.4870545 0.4870545 0.4870545 ZT12-15 0.264496 0.264496 0.264496 ZT16-19 0.4666055 0.4666055 0.4666055 ZT20-23 0.428949 0.428949 0.428949