condition mean min max ZT0-3 27.95 27.95 27.95 ZT4-7 32.1 32.1 32.1 ZT8-11 12.6 12.6 12.6 ZT12-15 34.95 34.95 34.95 ZT16-19 17.35 17.35 17.35 ZT20-23 35.45 35.45 35.45