condition mean min max ZT0-3 2538.0 2538.0 2538.0 ZT4-7 3175.0 3175.0 3175.0 ZT8-11 3091.9 3091.9 3091.9 ZT12-15 2640.0 2640.0 2640.0 ZT16-19 2758.0 2758.0 2758.0 ZT20-23 2846.05 2846.05 2846.05