condition mean min max ZT0-3 442.0 442.0 442.0 ZT4-7 296.7 296.7 296.7 ZT8-11 308.45000000000005 308.45000000000005 308.45000000000005 ZT12-15 286.45000000000005 286.45000000000005 286.45000000000005 ZT16-19 350.9 350.9 350.9 ZT20-23 447.15 447.15 447.15