condition mean min max ZT0-3 12.07205 12.07205 12.07205 ZT4-7 12.34534 12.34534 12.34534 ZT8-11 8.382214999999999 8.382214999999999 8.382214999999999 ZT12-15 3.728605 3.728605 3.728605 ZT16-19 5.053815 5.053815 5.053815 ZT20-23 6.7844 6.7844 6.7844