condition mean min max ZT0-3 0.3137333333333333 0.0 0.5755049999999999 ZT4-7 0.0 0.0 0.0 ZT8-11 0.7532774999999999 0.7532774999999999 0.7532774999999999 ZT12-15 0.4024325 0.2083475 0.5965175 ZT16-19 0.883779 0.883779 0.883779 ZT20-23 0.40327599999999997 0.40327599999999997 0.40327599999999997