condition mean min max ZT0-3 0.92545 0.0 1.8509 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.6375483333333333 0.0 1.2750966666666665 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0