condition mean min max ZT0-3 0.012653583333333334 0.0 0.03796075 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0190292 0.0 0.0380584 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0