condition mean min max ZT0-3 174.6 174.6 174.6 ZT4-7 24.8 24.8 24.8 ZT8-11 180.5 180.5 180.5 ZT12-15 124.25 124.25 124.25 ZT16-19 129.10000000000002 129.10000000000002 129.10000000000002 ZT20-23 173.9 173.9 173.9