【单选题】【消耗次数：1】
<img src=https://huaweicloudobs.ahjxjy.cn/7134306666FC3AFBC19E5F8CABA45B06.png title=QQ截图20170105210927.png alt=QQ截图20170105210927.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/0E7EC41479419C6F3CE4A14F817B9858.png title=QQ截图20170105211022.png alt=QQ截图20170105211022.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/3AFCC58A5AA0AC9522090A9C19D4A76F.png title=QQ截图20170105211029.png alt=QQ截图20170105211029.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/696473C46DEE14EB972205864B0596B8.png title=QQ截图20170105211036.png alt=QQ截图20170105211036.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/733AB926ED161E55E586BF5E43EF75F9.png title=QQ截图20170105211043.png alt=QQ截图20170105211043.png/>
参考答案：
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相关题目
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/878768604797FDC9F36F063B16F063C3.png title=QQ截图20170105211946.png alt=QQ截图20170105211946.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/E46A8483390F2825D1CFB85A2A816801.png title=QQ截图20170105211955.png alt=QQ截图20170105211955.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/799905B41C213907EAFC763464473F1F.png title=QQ截图20170105212001.png alt=QQ截图20170105212001.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/22ABA3EE71503FFC56D1182FA9C1D0E3.png title=QQ截图20170105212008.png alt=QQ截图20170105212008.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/CB7804AC8F89B223AE7187BD4E217E81.png title=QQ截图20170105212015.png alt=QQ截图20170105212015.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/B8E519D255F410DEC0CBB04218E47B10.png title=QQ截图20170105215205.png alt=QQ截图20170105215205.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/34818CD139B9C2A89F700C4CB4ED8444.png title=QQ截图20170105215213.png alt=QQ截图20170105215213.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/CA00968537D2720B487C7DA5112B6CE6.png title=QQ截图20170105215221.png alt=QQ截图20170105215221.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/E5EDFF71C1A83E73D1ECFC332B560AC3.png title=QQ截图20170105215228.png alt=QQ截图20170105215228.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/C4AD6AA9862BB41C2128B5C65D32DA70.png title=QQ截图20170105215235.png alt=QQ截图20170105215235.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/0FDBAE0BF64385130F1B9F25F9506F60.png title=QQ截图20170105212445.png alt=QQ截图20170105212445.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/41817FF339015A409172DAAB0A9128E8.png title=QQ截图20170105212454.png alt=QQ截图20170105212454.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/1DB0D02372ABB2BFA9D9424EEC3B7D0C.png title=QQ截图20170105212501.png alt=QQ截图20170105212501.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/678930E430843301050DBED4C00E8C38.png title=QQ截图20170105212509.png alt=QQ截图20170105212509.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/8860A577BE8D2ED7E295DD4D1156E5D1.png title=QQ截图20170105212518.png alt=QQ截图20170105212518.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/43E1EE48D81319A8EDF30DEDA44C0F21.png title=QQ截图20170105162344.png alt=QQ截图20170105162344.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/D77E8FBC079B0BF3229D07FFBF9A4031.png title=QQ截图20170105162412.png alt=QQ截图20170105162412.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/FF6D0DB8DBA30C68A45DE29ABE93AB33.png title=QQ截图20170105162423.png alt=QQ截图20170105162423.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/98EC6A07C160880103C16BE6F1D75E86.png title=QQ截图20170105162430.png alt=QQ截图20170105162430.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/14278AE739B6BDF1D63EF37683559C8D.png title=QQ截图20170105162443.png alt=QQ截图20170105162443.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/ACCC024B36B62798A28EAA4490A2341E.png title=QQ截图20170105142841.png alt=QQ截图20170105142841.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/A516FBC8509FE62ABF8594EF45B3D479.png title=QQ截图20170105142852.png alt=QQ截图20170105142852.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/7A195A7BB5A6D6630399232DD7CD4646.png title=QQ截图20170105142900.png alt=QQ截图20170105142900.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/6DECC1AF6722BC2F4FEA3F311AA1E076.png title=QQ截图20170105142909.png alt=QQ截图20170105142909.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/10BF496722BEDC67D564718AF21D49CB.png title=QQ截图20170105142917.png alt=QQ截图20170105142917.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/894A1E70C9CB257ED86E85DE6B4A73C3.png title=QQ截图20170105211247.png alt=QQ截图20170105211247.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/00709C2726C7B242A2722D0C74B938E7.png title=QQ截图20170105211255.png alt=QQ截图20170105211255.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/07A1CC2B4A8BEDC547ADF219C642A305.png title=QQ截图20170105211303.png alt=QQ截图20170105211303.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/B56F99CEE1E3C3E5FFBC7EE1037D4758.png title=QQ截图20170105211311.png alt=QQ截图20170105211311.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/AB6B07A528B54E83DDEE98D0B1B3FF7B.png title=QQ截图20170105211319.png alt=QQ截图20170105211319.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/A5BE767EC6F11D56CE6D3856F6AB5DE4.png title=QQ截图20170105211445.png alt=QQ截图20170105211445.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/C89A36D20078F37CC7392FFB8186EC9A.png title=QQ截图20170105211459.png alt=QQ截图20170105211459.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/311204225F69F0713FCF6695E23964AC.png title=QQ截图20170105211510.png alt=QQ截图20170105211510.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/DC6F7ADF6AC1FB838BB86A2152F4F2C7.png title=QQ截图20170105211517.png alt=QQ截图20170105211517.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/46F16E202ABC8F14695BF04BC8C1610D.png title=QQ截图20170105211524.png alt=QQ截图20170105211524.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/112CAF81FB4AA85C505260C1A3B46D64.png title=QQ截图20170105143206.png alt=QQ截图20170105143206.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/95289AC835C26724408AA4379AB734CB.png title=QQ截图20170105143213.png alt=QQ截图20170105143213.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/5C3CF7722AA35D3C7A4867689282CDB9.png title=QQ截图20170105143221.png alt=QQ截图20170105143221.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/4D2B5BE519A1E9E0F97FAE1569015188.png title=QQ截图20170105143232.png alt=QQ截图20170105143232.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/DE6CFD61F0859E4BD0CC321963B6FE1C.png title=QQ截图20170105143242.png alt=QQ截图20170105143242.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/EAC7F1517AF4CDD2C63116D3CBCE8EE2.png title=QQ截图20170105222541.png alt=QQ截图20170105222541.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/A127CD1DD6EEB74E6820960BFD01D22F.png title=QQ截图20170105222554.png alt=QQ截图20170105222554.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/F688398F0AFBA6F46B0B1F940C8BB838.png title=QQ截图20170105222601.png alt=QQ截图20170105222601.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/DDEA614A37E33503D8927FD69D4486A6.png title=QQ截图20170105222609.png alt=QQ截图20170105222609.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/B0D650E0BD48090250F46C8666CC7F71.png title=QQ截图20170105222616.png alt=QQ截图20170105222616.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/878768604797FDC9F36F063B16F063C3.png title=QQ截图20170105211946.png alt=QQ截图20170105211946.png style=white-space: normal;/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/E46A8483390F2825D1CFB85A2A816801.png title=QQ截图20170105211955.png alt=QQ截图20170105211955.png style=white-space: normal;/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/799905B41C213907EAFC763464473F1F.png title=QQ截图20170105212001.png alt=QQ截图20170105212001.png style=white-space: normal;/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/22ABA3EE71503FFC56D1182FA9C1D0E3.png title=QQ截图20170105212008.png alt=QQ截图20170105212008.png style=white-space: normal;/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/CB7804AC8F89B223AE7187BD4E217E81.png title=QQ截图20170105212015.png alt=QQ截图20170105212015.png style=white-space: normal;/>
随机题目
【单选题】
设总体X的密度函数为<img src=https://huaweicloudobs.ahjxjy.cn/E6E7D32F09385C824CE9543D307913D6.png style=vertical-align: middle;/>则θ的极大似然估计量为（ ）
①
<img src=https://huaweicloudobs.ahjxjy.cn/F6E90CCE87B4440AA1D46F4864A3CE90.png style=vertical-align: middle;/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/0E541A7790339DD7EDC0E6CC498FBA9B.png style=vertical-align: middle;/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/28DDDC54A52871B5E2C163823082B1B0.png style=vertical-align: middle;/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/B56C8BDBA4888D39FB11BCD0DCFA9FD1.png style=vertical-align: middle;/>
【单选题】
设随机变量<img class=jc-formula data-tex=X\sim N(\mu ,{ \sigma }^{ 2 }) src=https://huaweicloudobs.ahjxjy.cn/D440171B81C9D17A2BFF4C6AD5B14BF8.png style=vertical-align: middle;/>，<img class=jc-formula data-tex=\frac { Y }{ { \sigma }^{ 2 } } { \chi }^{ 2 }(n) src=https://huaweicloudobs.ahjxjy.cn/0F68490FD302E3A6F445FE286182B9EC.png style=vertical-align: middle;/>,且X与Y独立，<img class=jc-formula data-tex=T=\frac { X-\mu }{ \sqrt { Y } } \sqrt { n } src=https://huaweicloudobs.ahjxjy.cn/2719874CC9A9DAE295B81DE7D52F7E88.png style=vertical-align: middle;/>服从
①
t(n-1)
②
t(n)
③
N(0,1)
④
F(1,n)
【单选题】
X服从正态分布，且EX=-1，EX2=4，<img class=jc-formula data-tex=\bar { X } =\frac { 1 }{ n } \sum _{ i=1 }^{ n }{ X_i } src=https://huaweicloudobs.ahjxjy.cn/E16B8F2E164E4573B79D443116C4B867.png style=vertical-align: middle;/>服从的分布是
①
N(-1,3/n)
②
N(-1,4/n)
③
N(-1/n,4)
④
N(-1/n,3/n)
【单选题】
随机地从一批零件中抽取16个，测的长度（cm）为：2.14，2.10，2.13，2.15，2.13，2.12，2.13，2.10，2.15，2.12，2.14，2.10，2.13，2.11，2.14，2.11，设零件长度分布为正态分布，若σ未知，则总体μ的90%的置信区间为（ ）
①
（4.012，4.765）
②
（1.235，2.018）
③
（3.213，3.970）
④
（2.1175，2.1325）
【单选题】
设X1，…，X8与Y1，…，Y10分别来自两个正态总体N（-1,4）与N（2,5）的样本，且相互独立，S12和S22分别为两个样本的样本方差，则服从F（7,9）的统计量是
①
2S12/5S22
②
4S12/5S22
③
5S12/2S22
④
5S12/4S22
【单选题】
设总体X~N(80,202)2，从总体中抽取一个容量为100的样本，问样本均值和总体均值之差的绝对值大于3的概率是（ ）
①
0.02
②
0.13
③
0.43
④
0.67
【单选题】
设随机变量X和Y都服从N（0,1）分布，则下列结论正确的是
①
X+Y服从正态分布
②
X2+Y2服从分布<img class=jc-formula data-tex=\chi src=https://huaweicloudobs.ahjxjy.cn/4144680EC7DF2F36E866B65FACD76996.png style=vertical-align: middle;/>2分布
③
X2和Y2都服从分布<img class=jc-formula data-tex=\chi src=https://huaweicloudobs.ahjxjy.cn/4144680EC7DF2F36E866B65FACD76996.png style=white-space: normal; vertical-align: middle;/>2分布
④
X2/Y2服从F分布
【单选题】
设总体X服从两点分布b(1,p)，即P(X=1)=p，P(X=0)=1-p，其中p是未知参数，X1,X2,...,Xn是来自X的简单随机样本，则下面哪个不是统计量（ ）
①
<img src=https://huaweicloudobs.ahjxjy.cn/FD34AE052BBDF058DFCE8853AF0C0383.png _src=https://huaweicloudobs.ahjxjy.cn/FD34AE052BBDF058DFCE8853AF0C0383.png style=vertical-align: middle; >
②
<img src=https://huaweicloudobs.ahjxjy.cn/566FA21C63E032794D25BEAC1D3AD93F.png _src=https://huaweicloudobs.ahjxjy.cn/566FA21C63E032794D25BEAC1D3AD93F.png style=vertical-align: middle; >
③
<img src=https://huaweicloudobs.ahjxjy.cn/1A2F04B0ABB10DBE5024C4EFC0EABE50.png _src=https://huaweicloudobs.ahjxjy.cn/1A2F04B0ABB10DBE5024C4EFC0EABE50.png style=vertical-align: middle; >
④
<img src=https://huaweicloudobs.ahjxjy.cn/833EFBA907E905B0B6A247D2698510A8.png _src=https://huaweicloudobs.ahjxjy.cn/833EFBA907E905B0B6A247D2698510A8.png style=vertical-align: middle; >
【判断题】
假设随机变量X与Y在圆域：<img class=jc-formula data-tex={ x }^{ 2 }+{ y }^{ 2 }\le { r }^{ 2 } src=https://huaweicloudobs.ahjxjy.cn/4E59C7F72A01DDFB5C818DEEB39D61E2.png style=white-space: normal; vertical-align: middle;/>上服从均匀分布，则X与Y的相关系数非零。
①
正确
②
错误