condition mean min max ZT0-3 13.8632844325 13.050143975000001 14.67642489 ZT4-7 9.0318582595 8.974330837 9.089385682 ZT8-11 10.521924870000001 8.761895259500001 12.281954480500001 ZT12-15 13.6299873125 12.372904340000002 14.887070285 ZT16-19 14.21396537 13.04175468 15.38617606 ZT20-23 22.089536335 21.216727295 22.962345374999998