condition mean min max ZT0-3 969.704192 969.704192 969.704192 ZT4-7 261.5187575 261.5187575 261.5187575 ZT8-11 599.381005 599.381005 599.381005 ZT12-15 751.1578955 751.1578955 751.1578955 ZT16-19 1413.884548 1413.884548 1413.884548 ZT20-23 1382.146738 1382.146738 1382.146738