condition mean min max ZT0-3 10.923884999999999 10.35084 11.496929999999999 ZT4-7 12.07185 12.07185 12.07185 ZT8-11 18.68625 18.68625 18.68625 ZT12-15 0 0 0 ZT16-19 26.074550000000002 26.074550000000002 26.074550000000002 ZT20-23 12.9576 12.9576 12.9576