condition mean min max ZT0-3 6565.424364 6565.424364 6565.424364 ZT4-7 6154.31452 6154.31452 6154.31452 ZT8-11 5788.1446510000005 5788.1446510000005 5788.1446510000005 ZT12-15 6934.460641 6934.460641 6934.460641 ZT16-19 7451.361726499999 7451.361726499999 7451.361726499999 ZT20-23 9356.577515500001 9356.577515500001 9356.577515500001