condition mean min max ZT0-3 141.9 141.9 141.9 ZT4-7 144.0 144.0 144.0 ZT8-11 161.75 161.75 161.75 ZT12-15 153.9 153.9 153.9 ZT16-19 144.0 144.0 144.0 ZT20-23 137.89999999999998 137.89999999999998 137.89999999999998