condition mean min max ZT0-3 54.370866666666664 54.370866666666664 54.370866666666664 ZT4-7 36.171400000000006 36.171400000000006 36.171400000000006 ZT8-11 19.95195 19.95195 19.95195 ZT12-15 30.7785 30.7785 30.7785 ZT16-19 46.7234 46.7234 46.7234 ZT20-23 58.263799999999996 58.263799999999996 58.263799999999996