condition mean min max ZT0-3 200.75 200.75 200.75 ZT4-7 246.4 246.4 246.4 ZT8-11 321.85 321.85 321.85 ZT12-15 379.1 379.1 379.1 ZT16-19 342.6 342.6 342.6 ZT20-23 193.55 193.55 193.55