condition mean min max ZT0-3 0.22748225 0.224622 0.2303425 ZT4-7 0.340051 0.340051 0.340051 ZT8-11 0.23076999999999998 0.23076999999999998 0.23076999999999998 ZT12-15 0 0 0 ZT16-19 0.3391805 0.3391805 0.3391805 ZT20-23 0.0 0.0 0.0