condition mean min max ZT0-3 4515.1 4515.1 4515.1 ZT4-7 3459.0 3459.0 3459.0 ZT8-11 2931.2 2931.2 2931.2 ZT12-15 2791.6000000000004 2791.6000000000004 2791.6000000000004 ZT16-19 3455.85 3455.85 3455.85 ZT20-23 4101.85 4101.85 4101.85