condition mean min max ZT0-3 0.0159462 0.0159462 0.0159462 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 0.0087738 0.0087738 0.0087738 ZT20-23 0.01311294 0.01311294 0.01311294