condition mean min max ZT0-3 207.45 207.45 207.45 ZT4-7 167.7 167.7 167.7 ZT8-11 134.2 134.2 134.2 ZT12-15 90.6 90.6 90.6 ZT16-19 160.6 160.6 160.6 ZT20-23 177.55 177.55 177.55