condition mean min max ZT0-3 6.42907 4.950810000000001 7.90733 ZT4-7 26.214100000000002 26.214100000000002 26.214100000000002 ZT8-11 16.048650000000002 16.048650000000002 16.048650000000002 ZT12-15 0 0 0 ZT16-19 1.6231550000000001 1.6231550000000001 1.6231550000000001 ZT20-23 1.75497 1.75497 1.75497