[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f-F41gQQfJ7GHP-nSJWby0U76wLMS3xR3N0GkyZQbzx4":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":31,"type":32},[],"2024-10-31 17:40:39",163938606,[8,9,10,11],"标准差","平均差","极差","标准差系数",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},25,"2c12b5d923bb7a9acae8cd3475453456","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F16311a19c107ca5ac8c237b5379e85c1.jpg","统计学","work_37631653","第四章课后作业","在离散程度的测度中,最容易受极端值影响的是",[21,33,42,51,60,69,78,86,95,98],{"answer":22,"createTime":23,"id":24,"options":25,"question":30,"source":31,"type":32},[],"2024-10-31 17:40:38",163938594,[26,27,28,29],"68%","89%","95%","99%","某班学生的平均成绩是 80 分,标准差是 5 分.如果已知该班学生的考试分数为对称分布,可以判断成绩在 70~90 分之间的学生大约占","v1",0,{"answer":34,"createTime":23,"id":35,"options":36,"question":41,"source":31,"type":32},[],163938595,[37,38,39,40],"36","0.4","4","6","一组数据的离散系数为 0.6,平均数为 10,则方差为",{"answer":43,"createTime":23,"id":44,"options":45,"question":50,"source":31,"type":32},[],163938596,[46,47,48,49],"比较多组数据的平均水平","反映一组数据的平均水平","反映一组数据的离散程度","比较多组数据的离散程度","离散系数的主要用途是",{"answer":52,"createTime":23,"id":53,"options":54,"question":59,"source":31,"type":32},[],163938597,[55,56,57,58],"扁平分布","右偏分布","左偏分布","尖峰分布","如果峰态系数 K>0,表明该组数据是",{"answer":61,"createTime":23,"id":62,"options":63,"question":68,"source":31,"type":32},[],163938598,[64,65,66,67],"左偏的","无法确定","右偏的","对称的","在某公司进行的英语水平测试中,新员工的平均得分是 80 分,标准差是 5 分,中位数是 85 分,则新员工得分的分布形状是",{"answer":70,"createTime":23,"id":71,"options":72,"question":77,"source":31,"type":32},[],163938600,[73,74,75,76],"2158","3","2080","2187","在某城市中随机抽取 9 个家庭,调查得到每个家庭的人均月收入数据如下(单位:元):2080 1750 2080 2080 1850 1960 3000 2250 2630,则众数为",{"answer":79,"createTime":23,"id":80,"options":81,"question":85,"source":31,"type":32},[],163938602,[82,83,39,84],"5","25","28","某幼儿园有 58 名小朋友,其年龄(单位:周岁)的直方图如图所示,则小朋友年龄的众数为 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4c0dd2e9f632d24b5467ce97f12bfdac.png\">",{"answer":87,"createTime":5,"id":88,"options":89,"question":94,"source":31,"type":32},[],163938604,[90,91,92,93],"等于 0","等于 1","大于 0","大于 1","峰态通常是与标准正态分布相比较而言的.如果一组数据服从标准正态分布,则峰态系数的值",{"answer":96,"createTime":5,"id":6,"options":97,"question":19,"source":31,"type":32},[],[8,9,10,11],{"answer":99,"createTime":5,"id":100,"options":101,"question":102,"source":31,"type":32},[],163938608,[90,92,91,93],"偏态系数测度了数据分布的非对称性程度.如果一组数据的分布是对称的,则偏态系数"]