condition mean min max ZT0-3 0.1493655 0.0 0.4480965 ZT4-7 0.8163895 0.8163895 0.8163895 ZT8-11 0.0 0.0 0.0 ZT12-15 0.441141 0.41506 0.467222 ZT16-19 0.0 0.0 0.0 ZT20-23 0.888525 0.888525 0.888525