condition mean min max ZT0-3 4651.65 4651.65 4651.65 ZT4-7 6885.7 6885.7 6885.7 ZT8-11 5770.05 5770.05 5770.05 ZT12-15 2931.6499999999996 2931.6499999999996 2931.6499999999996 ZT16-19 1304.75 1304.75 1304.75 ZT20-23 2512.15 2512.15 2512.15