condition mean min max ZT0-3 31.768099 31.768099 31.768099 ZT4-7 32.668258 32.668258 32.668258 ZT8-11 32.715887 32.715887 32.715887 ZT12-15 30.598466000000002 30.598466000000002 30.598466000000002 ZT16-19 47.480267999999995 47.480267999999995 47.480267999999995 ZT20-23 61.93965849999999 61.93965849999999 61.93965849999999