condition mean min max ZT0-3 9.95975001125 9.403961445 10.5155385775 ZT4-7 7.2595919845 7.0711823845 7.4480015845 ZT8-11 5.22502696325 5.025207441 5.4248464855 ZT12-15 5.6987613155 4.527296274999999 6.870226356 ZT16-19 7.42107197275 6.624311876 8.2178320695 ZT20-23 9.422546977 9.3038324935 9.5412614605