condition mean min max ZT0-3 82.9 82.9 82.9 ZT4-7 78.1 78.1 78.1 ZT8-11 109.1 109.1 109.1 ZT12-15 105.45 105.45 105.45 ZT16-19 57.25 57.25 57.25 ZT20-23 71.65 71.65 71.65