condition mean min max ZT0-3 0.07207295 0.0259464 0.110589 ZT4-7 0.051705100000000004 0.051705100000000004 0.051705100000000004 ZT8-11 0.2400235 0.2400235 0.2400235 ZT12-15 0.34793450000000004 0.3292835 0.3665855 ZT16-19 0.22780899999999998 0.22780899999999998 0.22780899999999998 ZT20-23 0.2840515 0.2840515 0.2840515