condition mean min max ZT0-3 0.16766725 0.0941705 0.241164 ZT4-7 0.190084 0.190084 0.190084 ZT8-11 0.722165 0.722165 0.722165 ZT12-15 0 0 0 ZT16-19 0.426968 0.426968 0.426968 ZT20-23 0.3342865 0.3342865 0.3342865