condition mean min max ZT0-3 80.0431535675 67.328402165 92.75790497 ZT4-7 34.77010094 32.9160713 36.62413058 ZT8-11 56.16427921 37.51667678 74.81188164 ZT12-15 83.3463606725 77.508602335 89.18411900999999 ZT16-19 66.09726516 59.967656930000004 72.22687339000001 ZT20-23 63.6664583775 58.15926005 69.173656705