condition mean min max ZT0-3 0.20193550000000002 0.1357295 0.26814150000000003 ZT4-7 0.40594149999999996 0.40594149999999996 0.40594149999999996 ZT8-11 0.6869385 0.6869385 0.6869385 ZT12-15 0 0 0 ZT16-19 1.0690605 1.0690605 1.0690605 ZT20-23 0.4010295 0.4010295 0.4010295