condition mean min max ZT0-3 26.35 26.35 26.35 ZT4-7 17.8 17.8 17.8 ZT8-11 14.7 14.7 14.7 ZT12-15 22.65 22.65 22.65 ZT16-19 39.3 39.3 39.3 ZT20-23 24.049999999999997 24.049999999999997 24.049999999999997