condition mean min max ZT0-3 172.5 172.5 172.5 ZT4-7 184.2 184.2 184.2 ZT8-11 225.8 225.8 225.8 ZT12-15 192.5 192.5 192.5 ZT16-19 149.45 149.45 149.45 ZT20-23 150.3 150.3 150.3