condition mean min max ZT0-3 342.80033333333336 286.793 442.793 ZT4-7 629.371 629.371 629.371 ZT8-11 332.882 332.882 332.882 ZT12-15 305.08625 276.336 333.8365 ZT16-19 333.35900000000004 333.35900000000004 333.35900000000004 ZT20-23 329.0135 329.0135 329.0135