condition mean min max ZT0-3 436.197578 436.197578 436.197578 ZT4-7 451.1256065 451.1256065 451.1256065 ZT8-11 530.3887955 530.3887955 530.3887955 ZT12-15 610.0861095 610.0861095 610.0861095 ZT16-19 582.748553 582.748553 582.748553 ZT20-23 725.9325195 725.9325195 725.9325195