[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f_2CC6dj5ZEOtVljyoJUr4gB1FRNaVGPhIfc2gbh7FXw":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2025-11-27 01:42:54",242750896,[8,9,10,11],"拒绝原假设","不拒绝原假设","可以拒绝也可以不拒绝原假设","可能拒绝也可能不拒绝原假设",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},18,"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","6b4baafba1344cd892051b903f46320c","第8章测试(甘老师)","一项研究发现,2000年新购买小汽车的人中有40%是女性,在2005年所做的一项调查中,随机抽取的120位新车主任中有57%人为女性,在a=0.05的显著性水平下,检验2005年新车主中女性的比例是否有显著增加,建立的原假设和备择假设为H0:u≤40%,H1:u>40%,检验的结论是( )",[21,32,39,42,51,60,65,74,83,92],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],242750894,[25,26,27,28],"拒绝H0","不拒绝H0","可以拒绝H0,也可以不拒绝H0","可能拒绝H0,也可能不拒绝H0","检验假设H0:u≤50,H1:u>50,随机抽取一个n=16的样本,得到的统计量的值为t=1.341,在a=0.05的显著性水平下,得到的结论是( )","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":38,"source":30,"type":31},[],242750895,[25,26,36,37],"可以拒绝也可以不拒绝H0","可能拒绝也可能不拒绝H0","一项调查表明,5年前每个家庭每天看电视的平均时间为6.7小时,而最近对200个家庭的调查结果是:每个家庭每天看电视的平均时间为7.25小时,标准差为2.5小时.在a=0.05的显著性水平下,检验假设为H0:u≤6.7,H1:u>6.7,得到的结论是( )",{"answer":40,"createTime":5,"id":6,"options":41,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":43,"createTime":5,"id":44,"options":45,"question":50,"source":30,"type":31},[],242750897,[46,47,48,49],"z=1.57","z=-1.57","z=2.33","z=-2.33","一家汽车生产企业在广告中宣称"该公司的汽车可以保证在2年或24000公里内无事故",但该汽车的一个经销商认为保证"2年"这一项是不必要的,因为汽车车主在2年内形式的平均里程超过24000公里.假定这位经销商要检验假设H0:u≤24000,H1:u>24000,抽取容量n=32个车主的一个随机样本,计算出两年行驶里程的平均值为24517公里,标准差为1866公里,计算出的检验统计量为( )",{"answer":52,"createTime":5,"id":53,"options":54,"question":59,"source":30,"type":31},[],242750898,[55,56,57,58],"z>za","z<-za","z>za\u002F2或z<-za\u002F2","z>za或z<-za","若检验的假设为H0:u≤u0, H1:u",{"answer":61,"createTime":5,"id":62,"options":63,"question":64,"source":30,"type":31},[],242750899,[55,56,57,58],"若检验的假设为H0:u=u0,H1:u≠u0,则拒绝域为( )",{"answer":66,"createTime":5,"id":67,"options":68,"question":73,"source":30,"type":31},[],242750900,[69,70,71,72],"-3.33","3.33","-2.36","2.36","随机抽取一个n=100的样本,计算得到样本均值为60,样本标准差为15,要检验H0:u=65,H1≠65,检验的统计量是( )",{"answer":75,"createTime":5,"id":76,"options":77,"question":82,"source":30,"type":31},[],242750901,[78,79,80,81],"H0:π=20%,H1:π≠20%","H0:π≠20% , H1:π=20%","H0:π≥20%,H1:π<20%","H0:π≤20%,H1:π>20%","一项研究表明,司机驾车式因接打手机而发生事故的比例超过20%,用来检验这一结论的原假设和备择假设应为( )",{"answer":84,"createTime":5,"id":85,"options":86,"question":91,"source":30,"type":31},[],242750902,[87,88,89,90],"H0:u=5,H1:u≠5","H0:u≠5,H1:u=5","H0:u≤5,H1:u>5","H0:u≥5, H1:u<5","一种零件的标准长度是5cm,要检验某天生产的另加是否符合标准要求,建立的原假设和备择假设应为( )",{"answer":93,"createTime":5,"id":94,"options":95,"question":100,"source":30,"type":31},[],242750903,[96,97,98,99],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F86ae721b35f90ad76bfc26810c0db020.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff1e5b843deffc156bea1afe6e0391a75.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffa09cac4105a13e25b5450a1e4616eef.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3115d0c6d01078bde98dfd5ee646b6dc.png\">","在正态分布、小样本情况下,当总体方差已知时,检验总体均值所使用的统计量是( )"]