condition mean min max ZT0-3 35.7 35.7 35.7 ZT4-7 39.2 39.2 39.2 ZT8-11 4.05 4.05 4.05 ZT12-15 18.25 18.25 18.25 ZT16-19 29.1 29.1 29.1 ZT20-23 14.25 14.25 14.25