condition mean min max ZT0-3 293.5 293.5 293.5 ZT4-7 261.2 261.2 261.2 ZT8-11 298.35 298.35 298.35 ZT12-15 249.85000000000002 249.85000000000002 249.85000000000002 ZT16-19 329.4 329.4 329.4 ZT20-23 292.1 292.1 292.1