condition mean min max ZT0-3 2640.8999999999996 2640.8999999999996 2640.8999999999996 ZT4-7 2873.8 2873.8 2873.8 ZT8-11 2384.95 2384.95 2384.95 ZT12-15 2206.5 2206.5 2206.5 ZT16-19 2523.55 2523.55 2523.55 ZT20-23 2810.65 2810.65 2810.65