condition mean min max ZT0-3 4.3301 4.146615 4.513585 ZT4-7 3.09718 3.09718 3.09718 ZT8-11 1.33206 1.33206 1.33206 ZT12-15 0 0 0 ZT16-19 2.560855 2.560855 2.560855 ZT20-23 4.99337 4.99337 4.99337