condition mean min max ZT0-3 512.5 512.5 512.5 ZT4-7 452.0 452.0 452.0 ZT8-11 338.1 338.1 338.1 ZT12-15 403.5 403.5 403.5 ZT16-19 440.6 440.6 440.6 ZT20-23 448.95 448.95 448.95