condition mean min max ZT0-3 2552.05 2552.05 2552.05 ZT4-7 2093.1 2093.1 2093.1 ZT8-11 1951.1 1951.1 1951.1 ZT12-15 2460.95 2460.95 2460.95 ZT16-19 2317.3999999999996 2317.3999999999996 2317.3999999999996 ZT20-23 2413.25 2413.25 2413.25