condition mean min max ZT0-3 35.239225000000005 33.55615 36.9223 ZT4-7 47.38895 47.38895 47.38895 ZT8-11 55.6897 55.6897 55.6897 ZT12-15 0 0 0 ZT16-19 62.69605 62.69605 62.69605 ZT20-23 51.526650000000004 51.526650000000004 51.526650000000004