condition mean min max ZT0-3 98.1 98.1 98.1 ZT4-7 59.7 59.7 59.7 ZT8-11 67.0 67.0 67.0 ZT12-15 61.45 61.45 61.45 ZT16-19 86.65 86.65 86.65 ZT20-23 88.85 88.85 88.85