condition mean min max ZT0-3 205.4265269 198.4874474 212.36560640000002 ZT4-7 158.87012155 144.60253849999998 173.1377046 ZT8-11 193.478355475 179.7204801 207.23623085 ZT12-15 167.20745499999998 149.87032445 184.54458555 ZT16-19 142.31156587499999 141.6796042 142.94352755 ZT20-23 169.66623785000002 143.19227865 196.14019705