condition mean min max ZT0-3 0.7141725 0.7141725 0.7141725 ZT4-7 0.5866545000000001 0.5866545000000001 0.5866545000000001 ZT8-11 0.7572734999999999 0.7572734999999999 0.7572734999999999 ZT12-15 1.9607899999999998 1.9607899999999998 1.9607899999999998 ZT16-19 1.9202149999999998 1.9202149999999998 1.9202149999999998 ZT20-23 1.0786449999999999 1.0786449999999999 1.0786449999999999