condition mean min max ZT0-3 74.85 74.85 74.85 ZT4-7 65.9 65.9 65.9 ZT8-11 66.25 66.25 66.25 ZT12-15 62.800000000000004 62.800000000000004 62.800000000000004 ZT16-19 75.2 75.2 75.2 ZT20-23 92.05000000000001 92.05000000000001 92.05000000000001