condition mean min max ZT0-3 5.926678333333333 1.5114999999999998 9.350275 ZT4-7 0.4147375 0.4147375 0.4147375 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0861725 0.0 0.172345 ZT16-19 0.8120935 0.8120935 0.8120935 ZT20-23 1.6257350000000002 1.6257350000000002 1.6257350000000002