condition mean min max ZT0-3 76.1463895675 72.81185454 79.480924595 ZT4-7 65.214530735 62.790353673333335 67.63870779666667 ZT8-11 77.18358336333333 70.95464258666667 83.41252414 ZT12-15 71.942462035 71.16862188 72.71630219000001 ZT16-19 82.65347299000001 81.72045436 83.58649162 ZT20-23 93.49822480166667 91.07151292666667 95.92493667666666