condition mean min max ZT0-3 24.61 21.9235 26.349249999999998 ZT4-7 30.00745 30.00745 30.00745 ZT8-11 27.83615 27.83615 27.83615 ZT12-15 31.855575 30.6277 33.08345 ZT16-19 22.45465 22.45465 22.45465 ZT20-23 23.4328 23.4328 23.4328