condition mean min max ZT0-3 2175.45 2175.45 2175.45 ZT4-7 2367.6 2367.6 2367.6 ZT8-11 2643.2 2643.2 2643.2 ZT12-15 2476.55 2476.55 2476.55 ZT16-19 2413.35 2413.35 2413.35 ZT20-23 2311.95 2311.95 2311.95