condition mean min max ZT0-3 0.018578024999999998 0.01856555 0.0185905 ZT4-7 0.073317 0.073317 0.073317 ZT8-11 0.0551775 0.0551775 0.0551775 ZT12-15 0 0 0 ZT16-19 0.14657075 0.14657075 0.14657075 ZT20-23 0.01830935 0.01830935 0.01830935