[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fMGs9eom2vkTt7fthojUR75J0VpqdzPtwk14jACfj4fU":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2024-11-19 23:15:08",166593671,[8,9,10,11],"可信区间的可信度变大","标准误减小","可信区间变窄","抽样误差减少",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},20,"736bca46b11a28eb91d6bf0a517630ca","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9c1e48361b00f3ee2086f4e259ed792b.jpg","医学统计学2024-2025第一学期","b5a862db7ed44244922070abcd4c9f75","5.1抽样误差、抽样误差的规律性","增大样本含量,则错误的是",[21,32,41,50,59,68,71,80,89,97],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],166593666,[25,26,27,28],"越宽","越窄","不变","还与第二类错误有关","可信度1-α越大,则总体均数可信区间","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],166593667,[36,37,38,39],"严格执行随机抽样","增大样本含量","设立对照","减少个体变异","减小均数的抽样误差的可行方法之一是________",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],166593668,[45,46,47,48],"标准误是样本统计量的标准差","标准误反映了样本统计量的变异","标准误反映了总体参数的变异","标准误反映了抽样误差的大小","下面关于标准误的四种说法中,哪一种不正确________",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],166593669,[54,55,56,57],"均数越大,标准误越大","标准误越大,均数代表性越好","均数越小,标准误越小","标准误越小,均数代表性越好","均数与标准误的关系为________",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":30,"type":31},[],166593670,[63,64,65,66],"标准差小者,可信度大","标准差小者,准确度高","标准差小者,可信度大且准确度高","两者的可信度相同","从两个不同总体中随机抽样,样本含量相同,则两总体均数95%可信区间",{"answer":69,"createTime":5,"id":6,"options":70,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":72,"createTime":5,"id":73,"options":74,"question":79,"source":30,"type":31},[],166593672,[75,76,77,78],"χ2分布","F分布","标准正态分布","二项分布","当自由度趋向无穷大时,t分布将趋向于________",{"answer":81,"createTime":5,"id":82,"options":83,"question":88,"source":30,"type":31},[],166593673,[84,85,86,87],"标准差逐渐变小","标准误逐渐变大","参考值范围越来越稳定","可信区间越来越稳定","随着样本含量的增加,以下说法正确的是________",{"answer":90,"createTime":5,"id":91,"options":92,"question":96,"source":30,"type":31},[],166593674,[93,94,27,95],"增大","减小","可能变大,也可能变小","对于t分布来说,固定显著性水平的值,随着自由度的增大,t的临界值将会怎样变化",{"answer":98,"createTime":5,"id":99,"options":100,"question":105,"source":30,"type":31},[],166593675,[101,102,103,104],"均数的抽样误差","样本中位数","样本极差","样本标准差","增大样本含量,理论上可使下列哪项更小"]