condition mean min max ZT0-3 2.2852875 1.5306899999999999 3.039885 ZT4-7 0.0 0.0 0.0 ZT8-11 1.0016800000000001 1.0016800000000001 1.0016800000000001 ZT12-15 1.4860562499999999 0.0 2.9721124999999997 ZT16-19 2.7385683333333333 1.6904666666666666 3.78667 ZT20-23 0 0 0