condition mean min max ZT0-3 2651.2 2651.2 2651.2 ZT4-7 3611.2 3611.2 3611.2 ZT8-11 3296.8999999999996 3296.8999999999996 3296.8999999999996 ZT12-15 2332.0 2332.0 2332.0 ZT16-19 1898.65 1898.65 1898.65 ZT20-23 1890.3999999999999 1890.3999999999999 1890.3999999999999