condition mean min max ZT0-3 97.69999999999999 97.69999999999999 97.69999999999999 ZT4-7 67.0 67.0 67.0 ZT8-11 102.65 102.65 102.65 ZT12-15 96.4 96.4 96.4 ZT16-19 126.85000000000001 126.85000000000001 126.85000000000001 ZT20-23 175.15 175.15 175.15