condition mean min max ZT0-3 240.35 240.35 240.35 ZT4-7 140.5 140.5 140.5 ZT8-11 138.0 138.0 138.0 ZT12-15 164.64999999999998 164.64999999999998 164.64999999999998 ZT16-19 208.15 208.15 208.15 ZT20-23 223.65 223.65 223.65