condition mean min max ZT0-3 1.6168183333333335 0.0 4.850455 ZT4-7 1.52085 1.52085 1.52085 ZT8-11 0.0 0.0 0.0 ZT12-15 2.443795 0.0 4.88759 ZT16-19 0.0 0.0 0.0 ZT20-23 3.36581 3.36581 3.36581