condition mean min max ZT0-3 74.15 74.15 74.15 ZT4-7 109.3 109.3 109.3 ZT8-11 85.65 85.65 85.65 ZT12-15 72.8 72.8 72.8 ZT16-19 78.1 78.1 78.1 ZT20-23 68.80000000000001 68.80000000000001 68.80000000000001