condition mean min max ZT0-3 3.0771849999999996 2.4019399999999997 3.7524299999999995 ZT4-7 0.7268055 0.7268055 0.7268055 ZT8-11 0.4868025 0.4868025 0.4868025 ZT12-15 0 0 0 ZT16-19 2.93653 2.93653 2.93653 ZT20-23 2.26352 2.26352 2.26352