condition mean min max ZT0-3 30.728525 26.870449999999998 34.586600000000004 ZT4-7 138.058 138.058 138.058 ZT8-11 83.47855 83.47855 83.47855 ZT12-15 0 0 0 ZT16-19 51.4587 51.4587 51.4587 ZT20-23 96.5179 96.5179 96.5179