condition mean min max ZT0-3 596.036434625 413.9291893 778.14367995 ZT4-7 1014.0221646499999 1004.6832263 1023.361103 ZT8-11 446.53404777500003 316.6548007 576.41329485 ZT12-15 209.31475395 176.38702940000002 242.24247849999998 ZT16-19 357.83290839999995 352.84522474999994 362.82059205 ZT20-23 334.33723947500005 312.19063000000006 356.48384895