condition mean min max ZT0-3 95.976598 95.976598 95.976598 ZT4-7 386.4226385 386.4226385 386.4226385 ZT8-11 353.80380249999996 353.80380249999996 353.80380249999996 ZT12-15 293.695073 293.695073 293.695073 ZT16-19 75.7868985 75.7868985 75.7868985 ZT20-23 31.697670000000002 31.697670000000002 31.697670000000002