condition mean min max ZT0-3 144.25 144.25 144.25 ZT4-7 114.7 114.7 114.7 ZT8-11 135.35 135.35 135.35 ZT12-15 195.0 195.0 195.0 ZT16-19 91.0 91.0 91.0 ZT20-23 144.55 144.55 144.55