condition mean min max ZT0-3 1413.5500000000002 1413.5500000000002 1413.5500000000002 ZT4-7 2173.7 2173.7 2173.7 ZT8-11 2054.1 2054.1 2054.1 ZT12-15 1581.4 1581.4 1581.4 ZT16-19 942.45 942.45 942.45 ZT20-23 912.9000000000001 912.9000000000001 912.9000000000001