condition mean min max ZT0-3 109.69999999999999 109.69999999999999 109.69999999999999 ZT4-7 80.6 80.6 80.6 ZT8-11 86.8 86.8 86.8 ZT12-15 109.0 109.0 109.0 ZT16-19 81.3 81.3 81.3 ZT20-23 129.45 129.45 129.45