condition mean min max ZT0-3 0.22605366666666668 0.0 0.371651 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.270255 0.0 0.54051 ZT16-19 0.4543915 0.4543915 0.4543915 ZT20-23 0.0 0.0 0.0