condition mean min max ZT0-3 169.5 169.5 169.5 ZT4-7 168.1 168.1 168.1 ZT8-11 195.5 195.5 195.5 ZT12-15 172.2 172.2 172.2 ZT16-19 175.3 175.3 175.3 ZT20-23 211.35000000000002 211.35000000000002 211.35000000000002