condition mean min max ZT0-3 248.0 248.0 248.0 ZT4-7 296.8 296.8 296.8 ZT8-11 211.5 211.5 211.5 ZT12-15 214.5 214.5 214.5 ZT16-19 172.2 172.2 172.2 ZT20-23 189.05 189.05 189.05