condition mean min max ZT0-3 0.018755499999999998 0.0 0.0562665 ZT4-7 0.02561675 0.02561675 0.02561675 ZT8-11 0.1077505 0.1077505 0.1077505 ZT12-15 0.057290775 0.056078050000000004 0.0585035 ZT16-19 0.02511755 0.02511755 0.02511755 ZT20-23 0.0566925 0.0566925 0.0566925