condition mean min max ZT0-3 264.9 264.9 264.9 ZT4-7 333.6 333.6 333.6 ZT8-11 280.15 280.15 280.15 ZT12-15 144.45 144.45 144.45 ZT16-19 74.35 74.35 74.35 ZT20-23 84.65 84.65 84.65