condition mean min max ZT0-3 85.98793333333333 81.6646 88.71445 ZT4-7 69.80245 69.80245 69.80245 ZT8-11 66.81 66.81 66.81 ZT12-15 82.66772499999999 79.9938 85.34164999999999 ZT16-19 92.7629 92.7629 92.7629 ZT20-23 83.5103 83.5103 83.5103