condition mean min max ZT0-3 2329.8 2329.8 2329.8 ZT4-7 2108.3 2108.3 2108.3 ZT8-11 2433.1 2433.1 2433.1 ZT12-15 2683.85 2683.85 2683.85 ZT16-19 3115.75 3115.75 3115.75 ZT20-23 3037.6 3037.6 3037.6