condition mean min max ZT0-3 0.48618749699999997 0.201206214 0.77116878 ZT4-7 0.0499840905 0.0378779685 0.062090212500000005 ZT8-11 0.9783737447499999 0.4581681505 1.498579339 ZT12-15 2.9169134785 2.2519320055 3.5818949515000003 ZT16-19 2.0622236210000002 1.8769969965 2.2474502455 ZT20-23 0.7415595245 0.63351192 0.849607129