condition mean min max ZT0-3 68.6714 68.6714 68.6714 ZT4-7 73.38275 73.38275 73.38275 ZT8-11 62.6599 62.6599 62.6599 ZT12-15 55.82905 55.82905 55.82905 ZT16-19 59.5861 59.5861 59.5861 ZT20-23 67.19935 67.19935 67.19935