[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fNp9DjxU6ipPInmwDGbDX5B_7hD4fBpMTAMJt9EDioFg":3},{"id":4,"source":5,"question":6,"options":7,"answer":12,"related":13,"type":24,"origin":107,"createTime":26},228260332,"v1","X变量和Y变量之间满足方程\u003Cimg src=\"https:\u002F\u002Fp.ananas.chaoxing.com\u002Fstar3\u002Forigin\u002Fa928735c3e7e80c20acb87aec9e3b744.jpg\">,则以下说法正确的是()",[8,9,10,11],"X变量每减少10个单位,Y变量下降150个单位","X变量每增加10个单位,Y变量上升150个单位","X变量每减少10个单位,Y变量上升15个单位","X变量每增加10个单位,Y变量下降15个单位",[],[14,27,37,43,53,57,67,77,87,97],{"id":15,"source":5,"question":16,"options":17,"answer":22,"related":23,"type":24,"origin":25,"createTime":26},228260328,"散点图中发现两个变量间呈现直线趋势,进一步建立的回归模型属于()",[18,19,20,21],"多重线性回归","二元线性回归","多重非线性回归","简单线性回归",[],[],0,null,"2025-11-03T16:22:16+08:00",{"id":28,"source":5,"question":29,"options":30,"answer":35,"related":36,"type":24,"origin":25,"createTime":26},228260329,"按相关变量的规律性区分,回归可分为()",[31,32,33,34],"线性回归和非线性回归","一元线性回归和多重线性回归","简单回归和多重回归","直线回归和曲线回归",[],[],{"id":38,"source":5,"question":39,"options":40,"answer":41,"related":42,"type":24,"origin":25,"createTime":26},228260330,"按回归分析涉及的相关变量的数目,回归可分为()",[31,32,33,34],[],[],{"id":44,"source":5,"question":45,"options":46,"answer":51,"related":52,"type":24,"origin":25,"createTime":26},228260331,"已知两变量X,Y之间有这样的关系:\u003Cimg src=\"\u002Fananas\u002Flatex\u002Fp\u002F4286283\">,如果以Y作为自变量建立回归方程,则回归系数是()",[47,48,49,50],"\u003Cimg src=\"\u002Fananas\u002Flatex\u002Fp\u002F4286289\">","\u003Cimg src=\"\u002Fananas\u002Flatex\u002Fp\u002F4286292\">","\u003Cimg src=\"\u002Fananas\u002Flatex\u002Fp\u002F4286296\">","\u003Cimg src=\"\u002Fananas\u002Flatex\u002Fp\u002F4286299\">",[],[],{"id":4,"source":5,"question":6,"options":54,"answer":55,"related":56,"type":24,"origin":25,"createTime":26},[8,9,10,11],[],[],{"id":58,"source":5,"question":59,"options":60,"answer":65,"related":66,"type":24,"origin":25,"createTime":26},228260333,"假设初一和初二学生的数学成绩呈线性相关,下表是10个学生在初一(X)和初二(Y)的数学分数: 学号:1 2 3 4 5 6 7 8 9 10 X: 120 108 117 104 103 110 104 105 99 108 Y: 84 64 84 68 69 68 69 46 57 71 问:对X和Y之间相关关系正确的解释是()",[61,62,63,64],"r=0.56,变量Y的变异中有56%是由X的变异引起的","r=0.75,变量Y的变异中有75%是由X的变异引起的","r=0.75,变量Y的变异中有56%是由X的变异引起的","r=0.56,变量Y的变异中有75%是由X的变异引起的",[],[],{"id":68,"source":5,"question":69,"options":70,"answer":75,"related":76,"type":24,"origin":25,"createTime":26},228260334,"假设初一和初二学生的数学成绩呈线性相关,下表是10个学生在初一(X)和初二(Y)的数学分数: 学号:1 2 3 4 5 6 7 8 9 10 X: 120 108 117 104 103 110 104 105 99 108 Y: 84 64 84 68 69 68 69 46 57 71 问:用最小二乘法建立的回归方程是()",[71,72,73,74],"Y(^)=1.31X-73.21","Y(^)=5.75X-551.85","Y(^)=1.75X-51.85","Y(^)=71.31X-51.85",[],[],{"id":78,"source":5,"question":79,"options":80,"answer":85,"related":86,"type":24,"origin":25,"createTime":26},228260335,"假设初一和初二学生的数学成绩呈线性相关,下表是10个学生在初一(X)和初二(Y)的数学分数: 学号:1 2 3 4 5 6 7 8 9 10 X: 120 108 117 104 103 110 104 105 99 108 Y: 84 64 84 68 69 68 69 46 57 71 问:上一题的回归方程中,表示衡量Y值在估计值Y(^)上下波动的统计量是()",[81,82,83,84],"10.32","7.9","3.21","1.31",[],[],{"id":88,"source":5,"question":89,"options":90,"answer":95,"related":96,"type":24,"origin":25,"createTime":26},228260336,"关于最小二乘法表述正确的是()",[91,92,93,94],"散点图中每一点沿X轴方向到此回归直线的距离的平方和最小","散点图中每一点沿X轴方向到直线Y=Y(– 的距离的平方和最小","散点图中每一点沿Y轴方向到直线Y=Y– 的距离的平方和最小","散点图中每一点沿Y轴方向到此回归直线的距离的平方和最小",[],[],{"id":98,"source":5,"question":99,"options":100,"answer":105,"related":106,"type":24,"origin":25,"createTime":26},228260337,"回归分析中,对误差平方和\u003Cimg src=\"\u002Fananas\u002Flatex\u002Fp\u002F2404560\">而言,Y的自由度为()",[101,102,103,104],"1","2","N-1","N-2",[],[],{"courseName":108,"courseImg":109,"workName":110,"workId":111,"count":112,"courseId":113},"默认课程","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","第十章 方差分析","39a6487425b341f38664b17668b8b6a0",10,"53e1d2ef4961cca8eea3e23969ad2cb9"]