condition mean min max ZT0-3 1.16777156825 1.127583085 1.2079600515000002 ZT4-7 1.3334788574999998 1.0194514215 1.6475062935 ZT8-11 1.3677134005 1.3118030615 1.4236237395 ZT12-15 0.780354105 0.628466118 0.9322420920000001 ZT16-19 0.6668900259999999 0.43433086899999995 0.899449183 ZT20-23 1.5060753829999998 1.2426640715 1.7694866944999998