condition mean min max ZT0-3 44.6 44.6 44.6 ZT4-7 10.3 10.3 10.3 ZT8-11 41.55 41.55 41.55 ZT12-15 38.55 38.55 38.55 ZT16-19 30.6 30.6 30.6 ZT20-23 55.35 55.35 55.35