[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fY8IyBZrTh1SX9NuJgWYUUux5HBZ0tONdhfQ-Q1OVrQs":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":13,"question":20,"related":21,"source":32,"type":33},[],"2025-11-25 17:19:53",241689777,[8,9,10,11,12],"估计"正常人群"某指标95%观察值所在范围","反映该区间包含总体均数的可能性是95%","反映某指标的可能取值范围","反映某指标的观察值波动范围","反映95%的样本均数在此范围内",{"count":14,"courseId":15,"courseImg":16,"courseName":17,"workId":18,"workName":19},26,"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","work_47587317","作业6 参数估计与假设检验","均数95%置信区间主要用于( )",[22,34,37,47,57,67,77,87,97,107],{"answer":23,"createTime":5,"id":24,"options":25,"question":31,"source":32,"type":33},[],241689776,[26,27,28,29,30],"参数估计和假设检验","参数估计和统计描述","样本估计和假设检验","样本估计和统计描述","区间估计和假设检验","统计推断的主要任务是( )","v1",0,{"answer":35,"createTime":5,"id":6,"options":36,"question":20,"source":32,"type":33},[],[8,9,10,11,12],{"answer":38,"createTime":5,"id":39,"options":40,"question":46,"source":32,"type":33},[],241689778,[41,42,43,44,45],"增大","减小","不确定","不变化","以上都不对","当第二类错误β由0.2变到0.3时,则第一类错误α是( )",{"answer":48,"createTime":5,"id":49,"options":50,"question":56,"source":32,"type":33},[],241689779,[51,52,53,54,55],"个体变异程度的大小","个体集中趋势程度","样本均数抽样误差大小","资料分布特征","总体均数变异程度","抽样均数标准误是指( )",{"answer":58,"createTime":5,"id":59,"options":60,"question":66,"source":32,"type":33},[],241689780,[61,62,63,64,65],"单侧检验优于双侧检验","采用配对t检验还是成组t检验取决于研究设计","检验结果若P值小于0.05,则接受H0,犯错误的可能性很小","由于配对t检验的效率高于成组t检验,因此最好都用配对t检验","进行假设检验时拒绝H0,既可能犯I型错误,也可能犯Ⅱ型错误","关于假设检验,下列说法中正确的是( )",{"answer":68,"createTime":5,"id":69,"options":70,"question":76,"source":32,"type":33},[],241689781,[71,72,73,74,75],"H0不同","H1不同","检验统计量不同","确定P值不同","判断结果不同","不同类型的假设检验最关键的是( )",{"answer":78,"createTime":5,"id":79,"options":80,"question":86,"source":32,"type":33},[],241689782,[81,82,83,84,85],"求得的区间包含总体率的可能性为(1-α)","计算样本率抽样误差的大小","求得总体率的波动范围","估计样本率的大小","估计样本含量","总体率(1-α)可信区间指按一定方法( )",{"answer":88,"createTime":5,"id":89,"options":90,"question":96,"source":32,"type":33},[],241689783,[91,92,93,94,95],"标准误可用来估计医学参考值范围","标准差可反映样本均数的变异程度","标准误是表示抽样误差大小的指标","标准误可描述正态(近似正态)分布资料的频数分布","样本含量一定时,标准差越大,标准误越小","关于标准差与标准误,以下说法正确的是( )",{"answer":98,"createTime":5,"id":99,"options":100,"question":106,"source":32,"type":33},[],241689784,[101,102,103,104,105],"S","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff2d876481b674365940bec2c11d4b066.png\">","CV","MS","σ","描述均数抽样误差大小的指标是( )",{"answer":108,"createTime":5,"id":109,"options":110,"question":116,"source":32,"type":33},[],241689785,[111,112,113,114,115],"t分布是一种连续性分布","是以0为中心的对称分布","t分布就是样本均数的分布","当自由度为无穷大时,t分布就是标准正态分布","t分布的曲线形状固定","关于t分布,以下说法不正确的是( )"]