condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.070787219 0.0 0.141574438 ZT16-19 0.09657523833333333 0.044027217 0.14912325966666665 ZT20-23 0.0 0.0 0.0