[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fDzlsWjqriYPaDgG868VXPjNveLSj_Q_fsL6xEo1HDkc":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":10,"question":16,"related":17,"source":27,"type":59},[],"2023-05-07 18:46:28",897672766,[8,9],"对","错",{"courseId":11,"courseImg":12,"courseName":13,"workId":14,"workName":15},"1000008691","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb7455e2749a4927fed0175481fe48862.png","医学统计学原理与实践","41753442","医学统计学原理与实践教程考试","自变量的筛选无规则可循",[18,29,38,47,56,60,71,80,89,94],{"answer":19,"createTime":5,"id":20,"options":21,"question":26,"source":27,"type":28},[],897672651,[22,23,24,25],"499","496","4","1","对于总样本量为500的5个样本率的资料作卡方检验,其自由度为","v2",0,{"answer":30,"createTime":5,"id":31,"options":32,"question":37,"source":27,"type":28},[],897672654,[33,34,35,36],"抽样误差","本质差异","A和B均可能","全部都不是","样本均数与一个已知的或假设的总体均数之间的差别可能是",{"answer":39,"createTime":5,"id":40,"options":41,"question":46,"source":27,"type":28},[],897672658,[42,43,44,45],"两样本均数比较的t检验","两组多类构成比的卡方检验","两样本率比较的假设检验","两样本比较的秩和检验","将100名病人随机等分为两组后分别给予A,B 方案治疗,疗效按等级划分为治愈,好转,有效和无效.欲知两种方案的疗效何者较优,宜做",{"answer":48,"createTime":5,"id":49,"options":50,"question":55,"source":27,"type":28},[],897672678,[51,52,53,54],"0.95","0.6827","0.475","0.975","标准正态分布曲线下(-1,1)之间的面积约为",{"answer":57,"createTime":5,"id":6,"options":58,"question":16,"source":27,"type":59},[],[8,9],3,{"answer":61,"createTime":5,"id":62,"options":63,"question":69,"source":27,"type":70},[],897672770,[64,65,66,67,68],"方差分析可以用于两个样本的比较","完全随机设计更适合实验对象变异不大的资料","随机区组设计中,每一个区组内的例数都等于处理数","随机区组设计中,区组内及区组间的差异都是越小越好","随机区组设计中,区组间的差异是越小越好","下面说法中正确的是",1,{"answer":72,"createTime":5,"id":73,"options":74,"question":79,"source":27,"type":28},[],897672778,[75,76,77,78],"相同指标,均数相差较大","不同指标,均数相差较小","不同指标,均数相差较大","相同指标,标准差相差较大","用变异系数比较变异程度适用于",{"answer":81,"createTime":5,"id":82,"options":83,"question":88,"source":27,"type":28},[],897672779,[84,85,86,87],"35%","16.7%","18.3%","无法计算","随机选取男200人,女100人为某传染病研究的调查对象,测得其感染阳性率分别为20%和15%,则合并阳性率为",{"answer":90,"createTime":5,"id":91,"options":92,"question":93,"source":27,"type":59},[],897672782,[8,9],"当抽样研究的样本含量增大时,均数的标准误会变小",{"answer":95,"createTime":5,"id":96,"options":97,"question":103,"source":27,"type":70},[],897672787,[98,99,100,101,102],"有50%的个体存活时间大于该时间","其评估方法有图解法","评估方法包括内插法","存活一半的时间","医生定义的时间","生存分析中,中位生存时间是指"]