condition mean min max ZT0-3 24.508222500000002 20.24945 28.766995 ZT4-7 1.448525 1.448525 1.448525 ZT8-11 0.735465 0.735465 0.735465 ZT12-15 0 0 0 ZT16-19 2.13718 2.13718 2.13718 ZT20-23 3.56987 3.56987 3.56987