condition mean min max ZT0-3 79.247465 79.247465 79.247465 ZT4-7 77.722532 77.722532 77.722532 ZT8-11 63.8527955 63.8527955 63.8527955 ZT12-15 85.4432475 85.4432475 85.4432475 ZT16-19 80.545 80.545 80.545 ZT20-23 79.2678825 79.2678825 79.2678825