condition mean min max ZT0-3 2849.85 2849.85 2849.85 ZT4-7 2704.6 2704.6 2704.6 ZT8-11 2234.8999999999996 2234.8999999999996 2234.8999999999996 ZT12-15 1757.85 1757.85 1757.85 ZT16-19 2052.05 2052.05 2052.05 ZT20-23 2375.0 2375.0 2375.0