condition mean min max ZT0-3 74.18545 74.18545 74.18545 ZT4-7 95.0124 95.0124 95.0124 ZT8-11 87.3867 87.3867 87.3867 ZT12-15 65.328 65.328 65.328 ZT16-19 68.73984999999999 68.73984999999999 68.73984999999999 ZT20-23 68.8362 68.8362 68.8362