condition mean min max ZT0-3 126.5 126.5 126.5 ZT4-7 209.5 209.5 209.5 ZT8-11 203.7 203.7 203.7 ZT12-15 171.7 171.7 171.7 ZT16-19 150.75 150.75 150.75 ZT20-23 73.45 73.45 73.45