condition mean min max ZT0-3 53.05 53.05 53.05 ZT4-7 79.6 79.6 79.6 ZT8-11 75.85 75.85 75.85 ZT12-15 86.25 86.25 86.25 ZT16-19 74.55 74.55 74.55 ZT20-23 61.0 61.0 61.0