condition mean min max ZT0-3 118.9 118.9 118.9 ZT4-7 142.7 142.7 142.7 ZT8-11 308.2 308.2 308.2 ZT12-15 228.6 228.6 228.6 ZT16-19 178.89999999999998 178.89999999999998 178.89999999999998 ZT20-23 152.25 152.25 152.25