condition mean min max ZT0-3 102.74431538 78.69718076 126.79145000000001 ZT4-7 204.48615765 164.69400005 244.27831525000002 ZT8-11 409.50087807499995 337.302371 481.6993851499999 ZT12-15 308.861203625 230.19601339999997 387.52639385 ZT16-19 209.068338675 191.67778725 226.45889010000002 ZT20-23 172.46546045000002 172.01620630000002 172.91471460000002