condition mean min max ZT0-3 531.15 531.15 531.15 ZT4-7 484.6 484.6 484.6 ZT8-11 478.05 478.05 478.05 ZT12-15 346.8 346.8 346.8 ZT16-19 301.3 301.3 301.3 ZT20-23 331.95000000000005 331.95000000000005 331.95000000000005