condition mean min max ZT0-3 1.005765 0.0 2.01153 ZT4-7 1.015075 1.015075 1.015075 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0