condition mean min max ZT0-3 0.240331775 0.06019255 0.420471 ZT4-7 0.0 0.0 0.0 ZT8-11 0.103265 0.103265 0.103265 ZT12-15 0.027266600000000002 0.0 0.054533200000000004 ZT16-19 0.0 0.0 0.0 ZT20-23 0 0 0