condition mean min max ZT0-3 42.156400000000005 42.156400000000005 42.156400000000005 ZT4-7 28.443649999999998 28.443649999999998 28.443649999999998 ZT8-11 18.087699999999998 18.087699999999998 18.087699999999998 ZT12-15 17.08735 17.08735 17.08735 ZT16-19 40.9525 40.9525 40.9525 ZT20-23 39.45415 39.45415 39.45415