condition mean min max ZT0-3 82.68195 82.68195 82.68195 ZT4-7 77.21119999999999 77.21119999999999 77.21119999999999 ZT8-11 79.44695 79.44695 79.44695 ZT12-15 79.58664999999999 79.58664999999999 79.58664999999999 ZT16-19 80.1531 80.1531 80.1531 ZT20-23 79.11410000000001 79.11410000000001 79.11410000000001