condition mean min max ZT0-3 69.65 69.65 69.65 ZT4-7 59.5 59.5 59.5 ZT8-11 76.7 76.7 76.7 ZT12-15 84.94999999999999 84.94999999999999 84.94999999999999 ZT16-19 42.85 42.85 42.85 ZT20-23 68.05000000000001 68.05000000000001 68.05000000000001