condition mean min max ZT0-3 25.780785 25.780785 25.780785 ZT4-7 26.504175500000002 26.504175500000002 26.504175500000002 ZT8-11 27.974532500000002 27.974532500000002 27.974532500000002 ZT12-15 26.168592500000003 26.168592500000003 26.168592500000003 ZT16-19 24.74413 24.74413 24.74413 ZT20-23 26.384734 26.384734 26.384734