condition mean min max ZT0-3 214.60000000000002 214.60000000000002 214.60000000000002 ZT4-7 136.4 136.4 136.4 ZT8-11 175.85000000000002 175.85000000000002 175.85000000000002 ZT12-15 195.9 195.9 195.9 ZT16-19 191.7 191.7 191.7 ZT20-23 172.5 172.5 172.5