condition mean min max ZT0-3 123.75 123.75 123.75 ZT4-7 156.4 156.4 156.4 ZT8-11 179.45 179.45 179.45 ZT12-15 174.85 174.85 174.85 ZT16-19 117.05 117.05 117.05 ZT20-23 123.9 123.9 123.9