condition mean min max ZT0-3 41.900374 41.900374 41.900374 ZT4-7 58.873143999999996 58.873143999999996 58.873143999999996 ZT8-11 36.428875 36.428875 36.428875 ZT12-15 34.0393975 34.0393975 34.0393975 ZT16-19 17.1067675 17.1067675 17.1067675 ZT20-23 21.748207 21.748207 21.748207