condition mean min max ZT0-3 27.950000000000003 27.950000000000003 27.950000000000003 ZT4-7 26.5 26.5 26.5 ZT8-11 99.7 99.7 99.7 ZT12-15 107.4 107.4 107.4 ZT16-19 129.7 129.7 129.7 ZT20-23 76.55000000000001 76.55000000000001 76.55000000000001