condition mean min max ZT0-3 0.71213264425 0.4879291385 0.93633615 ZT4-7 7.798753048 5.4337124635 10.1637936325 ZT8-11 20.715466990000003 15.314716885 26.116217095000003 ZT12-15 28.389261285 27.93725474 28.84126783 ZT16-19 39.935206745 35.451140179999996 44.41927331 ZT20-23 68.6544583475 58.34104811 78.96786858499999