condition mean min max ZT0-3 87.078362 87.078362 87.078362 ZT4-7 100.129272 100.129272 100.129272 ZT8-11 112.63802749999999 112.63802749999999 112.63802749999999 ZT12-15 85.476981 85.476981 85.476981 ZT16-19 111.434369 111.434369 111.434369 ZT20-23 109.145463 109.145463 109.145463