condition mean min max ZT0-3 578.385903 578.385903 578.385903 ZT4-7 1020.0287535 1020.0287535 1020.0287535 ZT8-11 1022.342353 1022.342353 1022.342353 ZT12-15 888.3802665000001 888.3802665000001 888.3802665000001 ZT16-19 574.185363 574.185363 574.185363 ZT20-23 572.160057 572.160057 572.160057