condition mean min max ZT0-3 547.55 547.55 547.55 ZT4-7 300.5 300.5 300.5 ZT8-11 321.35 321.35 321.35 ZT12-15 475.65 475.65 475.65 ZT16-19 550.7 550.7 550.7 ZT20-23 638.1 638.1 638.1