condition mean min max ZT0-3 10.632246666666667 5.936735 15.5217 ZT4-7 17.5872 17.5872 17.5872 ZT8-11 102.8765 102.8765 102.8765 ZT12-15 15.3576975 13.702545 17.01285 ZT16-19 10.260335 10.260335 10.260335 ZT20-23 9.707889999999999 9.707889999999999 9.707889999999999