condition mean min max ZT0-3 0.5274293333333333 0.341483 0.79055 ZT4-7 0.31525349999999996 0.31525349999999996 0.31525349999999996 ZT8-11 0.526743 0.526743 0.526743 ZT12-15 0.323999 0.3066425 0.3413555 ZT16-19 0.430135 0.430135 0.430135 ZT20-23 0.7981590000000001 0.7981590000000001 0.7981590000000001