condition mean min max ZT0-3 0.09453115000000001 0.09453115000000001 0.09453115000000001 ZT4-7 0.0472989 0.0472989 0.0472989 ZT8-11 0.044822650000000006 0.044822650000000006 0.044822650000000006 ZT12-15 0.1322855 0.1322855 0.1322855 ZT16-19 0.0616574 0.0616574 0.0616574 ZT20-23 0.1224585 0.1224585 0.1224585