condition mean min max ZT0-3 130.15 130.15 130.15 ZT4-7 109.5 109.5 109.5 ZT8-11 188.25 188.25 188.25 ZT12-15 160.75 160.75 160.75 ZT16-19 262.05 262.05 262.05 ZT20-23 174.35 174.35 174.35