condition mean min max ZT0-3 191.907124 191.907124 191.907124 ZT4-7 202.57702799999998 202.57702799999998 202.57702799999998 ZT8-11 131.77557050000001 131.77557050000001 131.77557050000001 ZT12-15 144.550543 144.550543 144.550543 ZT16-19 131.7743855 131.7743855 131.7743855 ZT20-23 178.62338699999998 178.62338699999998 178.62338699999998