condition mean min max ZT0-3 5.45 5.45 5.45 ZT4-7 12.5 12.5 12.5 ZT8-11 25.25 25.25 25.25 ZT12-15 11.65 11.65 11.65 ZT16-19 27.25 27.25 27.25 ZT20-23 5.85 5.85 5.85