condition mean min max ZT0-3 0.0561555 0.0 0.112311 ZT4-7 0.3476345 0.3476345 0.3476345 ZT8-11 0.23076999999999998 0.23076999999999998 0.23076999999999998 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0