condition mean min max ZT0-3 9.275555555666667 9.275555555666667 9.275555555666667 ZT4-7 10.058888886666667 10.058888886666667 10.058888886666667 ZT8-11 34.94388889 34.94388889 34.94388889 ZT12-15 161.79999999 161.79999999 161.79999999 ZT16-19 106.02777778000001 106.02777778000001 106.02777778000001 ZT20-23 15.89888889 15.89888889 15.89888889