condition mean min max ZT0-3 69.8 69.8 69.8 ZT4-7 97.6 97.6 97.6 ZT8-11 52.75 52.75 52.75 ZT12-15 80.0 80.0 80.0 ZT16-19 107.6 107.6 107.6 ZT20-23 58.449999999999996 58.449999999999996 58.449999999999996