condition mean min max ZT0-3 0.03068425 0.0 0.0613685 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.034970375 0.0 0.06994075 ZT16-19 1.2739616666666665e-06 0.0 2.547923333333333e-06 ZT20-23 0 0 0