condition mean min max ZT0-3 2311.2 2311.2 2311.2 ZT4-7 2464.4 2464.4 2464.4 ZT8-11 2383.95 2383.95 2383.95 ZT12-15 2800.25 2800.25 2800.25 ZT16-19 2685.3500000000004 2685.3500000000004 2685.3500000000004 ZT20-23 2317.4 2317.4 2317.4