condition mean min max ZT0-3 481.30898 481.30898 481.30898 ZT4-7 364.070514 364.070514 364.070514 ZT8-11 413.4773255 413.4773255 413.4773255 ZT12-15 427.6132745 427.6132745 427.6132745 ZT16-19 702.8009085 702.8009085 702.8009085 ZT20-23 843.011719 843.011719 843.011719