condition mean min max ZT0-3 174.8 174.8 174.8 ZT4-7 317.9 317.9 317.9 ZT8-11 236.60000000000002 236.60000000000002 236.60000000000002 ZT12-15 172.2 172.2 172.2 ZT16-19 131.15 131.15 131.15 ZT20-23 124.8 124.8 124.8