condition mean min max ZT0-3 262.1 262.1 262.1 ZT4-7 120.2 120.2 120.2 ZT8-11 165.6 165.6 165.6 ZT12-15 202.85 202.85 202.85 ZT16-19 233.65 233.65 233.65 ZT20-23 301.75 301.75 301.75