condition mean min max ZT0-3 95.001313 95.001313 95.001313 ZT4-7 82.653018 82.653018 82.653018 ZT8-11 79.9248025 79.9248025 79.9248025 ZT12-15 72.5815565 72.5815565 72.5815565 ZT16-19 100.195716 100.195716 100.195716 ZT20-23 108.572534 108.572534 108.572534