condition mean min max ZT0-3 2804.0113682499996 2604.7371875 3003.2855489999997 ZT4-7 2358.90833375 2188.403362 2529.4133055 ZT8-11 2452.50340825 2374.8257785 2530.181038 ZT12-15 4192.26328325 4095.633185 4288.8933815 ZT16-19 5193.15034425 5155.2310645 5231.069624 ZT20-23 4166.771356249999 3819.785341 4513.7573715