condition mean min max ZT0-3 22.65 22.65 22.65 ZT4-7 30.9 30.9 30.9 ZT8-11 23.15 23.15 23.15 ZT12-15 59.0 59.0 59.0 ZT16-19 27.2 27.2 27.2 ZT20-23 34.1 34.1 34.1