condition mean min max ZT0-3 189.421175 189.421175 189.421175 ZT4-7 217.7320565 217.7320565 217.7320565 ZT8-11 212.8649345 212.8649345 212.8649345 ZT12-15 212.0736665 212.0736665 212.0736665 ZT16-19 226.23880450000001 226.23880450000001 226.23880450000001 ZT20-23 232.12016849999998 232.12016849999998 232.12016849999998