condition mean min max ZT0-3 158.25 158.25 158.25 ZT4-7 166.1 166.1 166.1 ZT8-11 137.85000000000002 137.85000000000002 137.85000000000002 ZT12-15 113.94999999999999 113.94999999999999 113.94999999999999 ZT16-19 109.5 109.5 109.5 ZT20-23 104.5 104.5 104.5