condition mean min max ZT0-3 204.846241 204.846241 204.846241 ZT4-7 187.94856249999998 187.94856249999998 187.94856249999998 ZT8-11 210.27398449999998 210.27398449999998 210.27398449999998 ZT12-15 196.33367700000002 196.33367700000002 196.33367700000002 ZT16-19 230.329701 230.329701 230.329701 ZT20-23 250.315057 250.315057 250.315057