condition mean min max ZT0-3 69.35 69.35 69.35 ZT4-7 67.0 67.0 67.0 ZT8-11 75.95 75.95 75.95 ZT12-15 71.95 71.95 71.95 ZT16-19 53.45 53.45 53.45 ZT20-23 52.35 52.35 52.35