condition mean min max ZT0-3 59.75 59.75 59.75 ZT4-7 68.4 68.4 68.4 ZT8-11 69.8 69.8 69.8 ZT12-15 160.75 160.75 160.75 ZT16-19 146.0 146.0 146.0 ZT20-23 69.2 69.2 69.2