condition mean min max ZT0-3 110.94741666666667 92.06425 138.9665 ZT4-7 88.61585 88.61585 88.61585 ZT8-11 68.41329999999999 68.41329999999999 68.41329999999999 ZT12-15 88.46357499999999 85.63565 91.2915 ZT16-19 110.069 110.069 110.069 ZT20-23 141.062 141.062 141.062