condition mean min max ZT0-3 0.044489684 0.018023731 0.070955637 ZT4-7 0.104265459 0.019758115 0.18877280300000002 ZT8-11 4.008089158500001 2.217302737 5.798875580000001 ZT12-15 12.6240780055 9.190652876 16.057503135 ZT16-19 9.73708088825 9.7109595985 9.763202178 ZT20-23 10.52451363125 10.2766003675 10.772426895