condition mean min max ZT0-3 172.95 172.95 172.95 ZT4-7 49.5 49.5 49.5 ZT8-11 130.2 130.2 130.2 ZT12-15 354.20000000000005 354.20000000000005 354.20000000000005 ZT16-19 320.75 320.75 320.75 ZT20-23 85.25 85.25 85.25