condition mean min max ZT0-3 41.4 41.4 41.4 ZT4-7 50.0 50.0 50.0 ZT8-11 19.25 19.25 19.25 ZT12-15 47.95 47.95 47.95 ZT16-19 48.7 48.7 48.7 ZT20-23 68.30000000000001 68.30000000000001 68.30000000000001