condition mean min max ZT0-3 102.5 102.5 102.5 ZT4-7 134.7 134.7 134.7 ZT8-11 166.1 166.1 166.1 ZT12-15 168.05 168.05 168.05 ZT16-19 142.4 142.4 142.4 ZT20-23 131.5 131.5 131.5