condition mean min max ZT0-3 226.75 226.75 226.75 ZT4-7 256.6 256.6 256.6 ZT8-11 239.3 239.3 239.3 ZT12-15 284.6 284.6 284.6 ZT16-19 312.2 312.2 312.2 ZT20-23 246.85 246.85 246.85