condition mean min max ZT0-3 10.95647 10.95647 10.95647 ZT4-7 10.6413635 10.6413635 10.6413635 ZT8-11 10.388752499999999 10.388752499999999 10.388752499999999 ZT12-15 8.5938535 8.5938535 8.5938535 ZT16-19 11.085352 11.085352 11.085352 ZT20-23 10.394627499999999 10.394627499999999 10.394627499999999