condition mean min max ZT0-3 0.0074956185 0.0 0.014991237 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.042451607499999995 0.0 0.08490321499999999