condition mean min max ZT0-3 72.98643333333334 24.9424 147.571 ZT4-7 59.002300000000005 59.002300000000005 59.002300000000005 ZT8-11 0.860892 0.860892 0.860892 ZT12-15 0.48594399999999993 0.0505505 0.9213374999999999 ZT16-19 0.146933 0.146933 0.146933 ZT20-23 0.8126675 0.8126675 0.8126675