condition mean min max ZT0-3 2880.5 2880.5 2880.5 ZT4-7 2519.3 2519.3 2519.3 ZT8-11 2604.8 2604.8 2604.8 ZT12-15 2476.6499999999996 2476.6499999999996 2476.6499999999996 ZT16-19 2632.95 2632.95 2632.95 ZT20-23 2803.05 2803.05 2803.05