condition mean min max ZT0-3 336.85 336.85 336.85 ZT4-7 308.3 308.3 308.3 ZT8-11 351.7 351.7 351.7 ZT12-15 384.6 384.6 384.6 ZT16-19 482.9 482.9 482.9 ZT20-23 427.75 427.75 427.75