[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fG27Zr0LICJs6ep4ABCn_JP7_RSG7IZYfChtJnWvhTds":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":13,"question":17,"related":18,"source":29,"type":30},[],"2024-01-03 18:49:43",126267888,[8,9,10,11,12],"极差","两均数之差","两标准差之差","标准差","变异系数",{"courseId":14,"courseImg":15,"courseName":16},"525adafe465018da4e6fb40d2cc338d0","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F20c271bf6de5c9128a3cead37a298541.jpg","医学统计学（成教）-寒暑假","比较身高和体重两组数据变异度大小宜采用( )",[19,31,34,45,55,64,74,84,94,104],{"answer":20,"createTime":5,"id":21,"options":22,"question":28,"source":29,"type":30},[],126267885,[23,24,25,26,27],"也等于7","等于9","等于10","界于7-3与7+3之间","界于7-1.96x2与7+1.96x2之间","若X值的均数等于7,标准差等于2,则X+3的均数( )","v1",0,{"answer":32,"createTime":5,"id":6,"options":33,"question":17,"source":29,"type":30},[],[8,9,10,11,12],{"answer":35,"createTime":36,"id":37,"options":38,"question":44,"source":29,"type":30},[],"2024-01-03 18:49:44",126267893,[39,40,41,42,43],"C的临床疗效(将受试对象随机分为三组,观察结果为有效和无效).该资料的类型为( ) A. 定量资料","等级资料","二项分类资料","多项有序分类资料","多项无序分类资料","医师进行一临床试验以观察三种降血糖药物",{"answer":46,"createTime":36,"id":47,"options":48,"question":54,"source":29,"type":30},[],126267898,[49,50,51,52,53],"该疗法疗效好","该疗法疗效一般","该疗法疗效只有近期疗效","因治疗例数少,尚不能说明该疗法的疗效如何","因无对照,尚不能说明该疗法的疗效如何","用某疗法治疗胃溃疡病人50例,一月后40例好转,由此可认为( )",{"answer":56,"createTime":36,"id":57,"options":58,"question":63,"source":29,"type":30},[],126267905,[59,60,40,61,62],"计数资料","分类资料","计量资料","有序资料","在某地对研究对象流感抗体水平的调查中,测得10名儿童血清中某型病毒血凝抑制抗体效价倒数为:5,5,5,5,5,10,10,10,20,40.该数据的类型是( )",{"answer":65,"createTime":36,"id":66,"options":67,"question":73,"source":29,"type":30},[],126267909,[68,69,70,71,72],"均数不变,标准差变","均数和标准差都不变","均数变而标准差不变","均数和标准差都改变","均数与标准差的变化情况无法确定","设随机变量X符从均数为&mu;(&mu;&ne;0),标准差为&sigma;(&sigma;&ne;1)的正态分布,作 u=(X-&mu;)\u002F&sigma;的变量变换,则和X的均数与标准差相比,其u值的( )",{"answer":75,"createTime":36,"id":76,"options":77,"question":83,"source":29,"type":30},[],126267916,[78,79,80,81,82],"单样本t检验","配对t检验","成组设计两样本均数比较的t检验","成组设计两样本几何均数比较的t检验","u检验","已知某市区 1995 年男孩出生体重的总体均数为3.52kg,随机抽样调查了郊县的20名男孩,出生体重的均数为3.29kg,欲分析市区和郊区男孩的出生体重是否不同,应用( )",{"answer":85,"createTime":36,"id":86,"options":87,"question":93,"source":29,"type":30},[],126267919,[88,89,90,91,92],"标准差的单位与原始数据的单位不相同","标准差的单位与原始数据的单位相同","同一资料的标准差一定比均数小","同一资料的标准差一定比均数大","标准差就是标准误","关于标准差,表述正确的是( )",{"answer":95,"createTime":36,"id":96,"options":97,"question":103,"source":29,"type":30},[],126267927,[98,99,100,101,102],"点估计和区间估计","集中趋势与离散趋势指标","统计描述和统计图表","参数估计和假设检验","参数估计和统计预测","统计推断的内容包括( )",{"answer":105,"createTime":36,"id":106,"options":107,"question":113,"source":29,"type":30},[],126267928,[108,109,110,111,112],"构成比","率","相对比","动态数列指标","标化率","要对年龄构成比不同的两个县进行总死亡率的对比,应先计算( )"]