condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.443771 0.443771 0.443771 ZT8-11 0.0 0.0 0.0 ZT12-15 0.744121 0.0 1.488242 ZT16-19 0.451582 0.451582 0.451582 ZT20-23 0.0 0.0 0.0