condition mean min max ZT0-3 600.016603 600.016603 600.016603 ZT4-7 654.7147145 654.7147145 654.7147145 ZT8-11 653.2960545000001 653.2960545000001 653.2960545000001 ZT12-15 709.8551 709.8551 709.8551 ZT16-19 712.2149314999999 712.2149314999999 712.2149314999999 ZT20-23 494.456828 494.456828 494.456828