condition mean min max ZT0-3 34.86 34.86 34.86 ZT4-7 26.5367 26.5367 26.5367 ZT8-11 28.40805 28.40805 28.40805 ZT12-15 29.2456 29.2456 29.2456 ZT16-19 49.10435 49.10435 49.10435 ZT20-23 42.4709 42.4709 42.4709