condition mean min max ZT0-3 215.6 215.6 215.6 ZT4-7 149.1 149.1 149.1 ZT8-11 140.7 140.7 140.7 ZT12-15 234.6 234.6 234.6 ZT16-19 295.35 295.35 295.35 ZT20-23 284.1 284.1 284.1