condition mean min max ZT0-3 1794.296122 1794.296122 1794.296122 ZT4-7 2697.1664655 2697.1664655 2697.1664655 ZT8-11 2580.7950495 2580.7950495 2580.7950495 ZT12-15 1173.8814615000001 1173.8814615000001 1173.8814615000001 ZT16-19 301.377703 301.377703 301.377703 ZT20-23 76.00119699999999 76.00119699999999 76.00119699999999