condition mean min max ZT0-3 1129.25 1129.25 1129.25 ZT4-7 1748.2 1748.2 1748.2 ZT8-11 1487.75 1487.75 1487.75 ZT12-15 907.0999999999999 907.0999999999999 907.0999999999999 ZT16-19 742.4 742.4 742.4 ZT20-23 929.5 929.5 929.5