condition mean min max ZT0-3 107.3 107.3 107.3 ZT4-7 215.0 215.0 215.0 ZT8-11 237.05 237.05 237.05 ZT12-15 189.5 189.5 189.5 ZT16-19 158.75 158.75 158.75 ZT20-23 167.2 167.2 167.2