condition mean min max ZT0-3 36.214250907499995 31.279516315 41.148985499999995 ZT4-7 11.560937928000001 10.048486556 13.0733893 ZT8-11 16.053823426999998 15.386034505000001 16.721612348999997 ZT12-15 26.934302130000003 23.880211420000002 29.988392840000003 ZT16-19 44.99734385 36.995377625 52.999310075 ZT20-23 55.06573467 50.519063270000004 59.61240607