condition mean min max ZT0-3 67.05 67.05 67.05 ZT4-7 49.5 49.5 49.5 ZT8-11 68.69999999999999 68.69999999999999 68.69999999999999 ZT12-15 84.9 84.9 84.9 ZT16-19 65.6 65.6 65.6 ZT20-23 79.05 79.05 79.05