condition mean min max ZT0-3 0.87036941975 0.5003974455 1.240341394 ZT4-7 0.12071893125 0.0687468055 0.17269105699999998 ZT8-11 0.09614330375 0.0 0.1922866075 ZT12-15 1.0803258224999999 0.9233692185 1.2372824264999998 ZT16-19 0.51057698275 0.38586323299999997 0.6352907325 ZT20-23 0.17466122974999998 0.0407064105 0.30861604899999995