condition mean min max ZT0-3 27.468960000000003 7.20883 37.810550000000006 ZT4-7 6.462645 6.462645 6.462645 ZT8-11 8.16654 8.16654 8.16654 ZT12-15 12.9187475 12.337845000000002 13.499649999999999 ZT16-19 25.67565 25.67565 25.67565 ZT20-23 45.068250000000006 45.068250000000006 45.068250000000006