condition mean min max ZT0-3 229.28733333333332 189.35399999999998 295.9275 ZT4-7 239.94299999999998 239.94299999999998 239.94299999999998 ZT8-11 189.4395 189.4395 189.4395 ZT12-15 194.5375 185.562 203.51299999999998 ZT16-19 159.17849999999999 159.17849999999999 159.17849999999999 ZT20-23 163.3305 163.3305 163.3305