condition mean min max ZT0-3 41.6 41.6 41.6 ZT4-7 60.7 60.7 60.7 ZT8-11 55.75 55.75 55.75 ZT12-15 47.7 47.7 47.7 ZT16-19 90.55 90.55 90.55 ZT20-23 70.6 70.6 70.6