condition mean min max ZT0-3 176.85000000000002 176.85000000000002 176.85000000000002 ZT4-7 157.3 157.3 157.3 ZT8-11 117.25 117.25 117.25 ZT12-15 96.35 96.35 96.35 ZT16-19 107.9 107.9 107.9 ZT20-23 125.55000000000001 125.55000000000001 125.55000000000001