condition mean min max ZT0-3 0.7146015 0.7146015 0.7146015 ZT4-7 0.7309015 0.7309015 0.7309015 ZT8-11 0.87863 0.87863 0.87863 ZT12-15 0.7633624999999999 0.7633624999999999 0.7633624999999999 ZT16-19 0.8862675 0.8862675 0.8862675 ZT20-23 0.6959949999999999 0.6959949999999999 0.6959949999999999