condition mean min max ZT0-3 86.3 86.3 86.3 ZT4-7 45.4 45.4 45.4 ZT8-11 80.69999999999999 80.69999999999999 80.69999999999999 ZT12-15 77.7 77.7 77.7 ZT16-19 53.05 53.05 53.05 ZT20-23 37.45 37.45 37.45