condition mean min max ZT0-3 3497.65 3497.65 3497.65 ZT4-7 3224.6 3224.6 3224.6 ZT8-11 4286.5 4286.5 4286.5 ZT12-15 3721.05 3721.05 3721.05 ZT16-19 4037.85 4037.85 4037.85 ZT20-23 4056.1499999999996 4056.1499999999996 4056.1499999999996