condition mean min max ZT0-3 51.25 51.25 51.25 ZT4-7 40.6 40.6 40.6 ZT8-11 97.65 97.65 97.65 ZT12-15 35.25 35.25 35.25 ZT16-19 44.9 44.9 44.9 ZT20-23 69.15 69.15 69.15