condition mean min max ZT0-3 28.4 28.4 28.4 ZT4-7 24.1 24.1 24.1 ZT8-11 16.9 16.9 16.9 ZT12-15 13.0 13.0 13.0 ZT16-19 39.2 39.2 39.2 ZT20-23 41.45 41.45 41.45