condition mean min max ZT0-3 56.1741 34.7243 84.85560000000001 ZT4-7 49.505849999999995 49.505849999999995 49.505849999999995 ZT8-11 5.216615 5.216615 5.216615 ZT12-15 19.167475 16.026049999999998 22.3089 ZT16-19 27.3699 27.3699 27.3699 ZT20-23 56.0133 56.0133 56.0133