condition mean min max ZT0-3 2172.8500000000004 2172.8500000000004 2172.8500000000004 ZT4-7 2317.1 2317.1 2317.1 ZT8-11 2153.4 2153.4 2153.4 ZT12-15 2017.9 2017.9 2017.9 ZT16-19 2106.05 2106.05 2106.05 ZT20-23 2266.8500000000004 2266.8500000000004 2266.8500000000004