condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.15050900283333332 0.0 0.30101800566666664 ZT12-15 0.0 0.0 0.0 ZT16-19 0.15501303983333334 0.0 0.3100260796666667 ZT20-23 0.0 0.0 0.0