condition mean min max ZT0-3 34.0 34.0 34.0 ZT4-7 15.2 15.2 15.2 ZT8-11 28.45 28.45 28.45 ZT12-15 10.0 10.0 10.0 ZT16-19 27.75 27.75 27.75 ZT20-23 17.65 17.65 17.65