condition mean min max ZT0-3 162.5 162.5 162.5 ZT4-7 158.5 158.5 158.5 ZT8-11 202.65 202.65 202.65 ZT12-15 123.2 123.2 123.2 ZT16-19 180.3 180.3 180.3 ZT20-23 68.8 68.8 68.8