condition mean min max ZT0-3 0.7890493089999999 0.47711655299999994 1.100982065 ZT4-7 3.16259659575 2.3933036775 3.931889514 ZT8-11 4.553027807 3.985121786 5.120933828 ZT12-15 14.742859107 8.977154649 20.508563565 ZT16-19 11.9154799725 11.40191233 12.429047615 ZT20-23 17.6215027575 16.500930485 18.74207503