condition mean min max ZT0-3 27.3 27.3 27.3 ZT4-7 26.0 26.0 26.0 ZT8-11 14.15 14.15 14.15 ZT12-15 15.950000000000001 15.950000000000001 15.950000000000001 ZT16-19 6.9 6.9 6.9 ZT20-23 24.35 24.35 24.35