condition mean min max ZT0-3 202.900887 202.900887 202.900887 ZT4-7 145.8001125 145.8001125 145.8001125 ZT8-11 261.0003195 261.0003195 261.0003195 ZT12-15 259.2438485 259.2438485 259.2438485 ZT16-19 208.581867 208.581867 208.581867 ZT20-23 171.89200499999998 171.89200499999998 171.89200499999998