condition mean min max ZT0-3 36.751946605 31.332285810000002 42.1716074 ZT4-7 32.3023256525 24.8501641 39.754487205000004 ZT8-11 54.923873375 50.93421619 58.91353056 ZT12-15 26.610225927499997 16.868185105 36.35226675 ZT16-19 32.361432022500004 26.404598730000004 38.318265315000005 ZT20-23 59.6786424025 50.991898225 68.36538658