condition mean min max ZT0-3 28.301000000000002 28.301000000000002 28.301000000000002 ZT4-7 30.930149999999998 30.930149999999998 30.930149999999998 ZT8-11 19.841250000000002 19.841250000000002 19.841250000000002 ZT12-15 20.54175 20.54175 20.54175 ZT16-19 26.2353 26.2353 26.2353 ZT20-23 30.061799999999998 30.061799999999998 30.061799999999998