condition mean min max ZT0-3 22.754450000000002 12.24345 29.1598 ZT4-7 12.8609 12.8609 12.8609 ZT8-11 10.12407 10.12407 10.12407 ZT12-15 14.918275 13.6083 16.22825 ZT16-19 17.84195 17.84195 17.84195 ZT20-23 28.96065 28.96065 28.96065