condition mean min max ZT0-3 43.448529 43.448529 43.448529 ZT4-7 41.155094000000005 41.155094000000005 41.155094000000005 ZT8-11 44.6519585 44.6519585 44.6519585 ZT12-15 41.738076500000005 41.738076500000005 41.738076500000005 ZT16-19 47.277243999999996 47.277243999999996 47.277243999999996 ZT20-23 45.19811 45.19811 45.19811