condition mean min max ZT0-3 3027.05 3027.05 3027.05 ZT4-7 1952.4 1952.4 1952.4 ZT8-11 1718.5500000000002 1718.5500000000002 1718.5500000000002 ZT12-15 1426.4499999999998 1426.4499999999998 1426.4499999999998 ZT16-19 1577.45 1577.45 1577.45 ZT20-23 2187.45 2187.45 2187.45