condition mean min max ZT0-3 832.128425 832.128425 832.128425 ZT4-7 536.8264415 536.8264415 536.8264415 ZT8-11 525.431374 525.431374 525.431374 ZT12-15 614.7120895 614.7120895 614.7120895 ZT16-19 656.8360675 656.8360675 656.8360675 ZT20-23 590.8496104999999 590.8496104999999 590.8496104999999