【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/F1324B7F7F61B079B2100E0BC20B6007.png title=题干.png alt=题干.png width=843 height=50 style=width: 843px; height: 50px;/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/B9CC1439784C2BE146D84D79E7844E29.png style=width: 255px; height: 37px; title=3.png width=255 height=37/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/E99D92E6781DE3E637F6D69B618BB899.png title=1.png style=white-space: normal; width: 435px; height: 42px; width=435 height=42/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/5CC268F859C184DA65982FD626A1B2C7.png title=2.png style=white-space: normal; width: 330px; height: 50px; width=330 height=50/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/8CFC9E018245536F53DC6933BDCCE8B1.png title=4.png style=white-space: normal; width: 400px; height: 36px; width=400 height=36/>
【单选题】
关于检验水平a的设定,下列叙述错误的是( ).
②
在检验实施之前,a应是事先给定的,不可擅自改动
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/29E65629D2B5503C003EB7062FE42591.png title=题干.png alt=题干.png width=799 height=147 style=width: 799px; height: 147px;/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/4AFE1C1A40ACE94179DA486477223918.png style= title=1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/9A5C0D5A7012A3220449A23A8B0173DB.png title=2.png style=font-size: 18.018px; white-space: normal;/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/51D92B7B1ABB64CF66AB812DBC3361C2.png title=3.png style=font-size: 18.018px; white-space: normal;/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/7C91FDCCD527FABCF1925DE8B931CF38.png title=4.png style=font-size: 18.018px; white-space: normal;/>
【单选题】
若Cov(X,Y)=0,则下列结论中正确的是( ).
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/4B1B96F74AEAFA4845C003175FF7B97A.png title=题干.png alt=题干.png width=835 height=138 style=width: 835px; height: 138px;/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/E71DE4E71D84BF8E0502B9D4B6CF783E.png style= title=1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/D63DCA0E181BA13E946D15F7D9A46FD0.png title=2.png style=white-space: normal;/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/C4CCA2F7E25978F5F38B553D61300A40.png title=3.png style=white-space: normal;/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/9ECE1659F829E365F113D090EBF59A41.png title=4.png style=white-space: normal;/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/A5C8EEE864F5E420D7493392492A0ACB.png title=题干.png alt=题干.png width=550 height=46 style=width: 550px; height: 46px;/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/E8227261439D1CC3AFC73FDCD39FA1A6.png style=width: 207px; height: 46px; title=1.png width=207 height=46/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/CB6F6A16DA23CE2A67886B7775A68BDE.png title=2.png style=white-space: normal; width: 218px; height: 46px; width=218 height=46/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/297525CEB8D748EFCE660ACBDD03A357.png title=3.png style=white-space: normal; width: 194px; height: 48px; width=194 height=48/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/60971BFBB0EE2D5FAA7B5D162BA33876.png title=4.png style=white-space: normal; width: 131px; height: 46px; width=131 height=46/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/04A151F40559E25E8B49C9E8A652D8BA.png title=题干.png alt=题干.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/4619B9A14963EA2A63874E2235DF51E4.png style= title=1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/2B2C2417768E92D0D6057DE7E25C22C4.png title=2.png style=white-space: normal;/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/C8B5353A5A00C96781E012E780398113.png title=3.png style=white-space: normal;/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/ACA7CAB7B893F842D2B3DB0F53585B9E.png title=4.png style=white-space: normal;/>
【单选题】
设X~B(2,p),Y~B(3,p)若P(X1)=5/9,则P(X1)=
【单选题】
接上题,任取一件产品,设其价值为X, 则EX为( ).
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/CCC05940A804977BE239720BBDA51B25.png title=题干.png alt=题干.png width=784 height=43 style=width: 784px; height: 43px;/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/E4B5592E21E079EB5C40749489FEB427.png style= title=2.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/EFC675AE3744A9AF93F09018BCB4A2E7.png title=1.png style=white-space: normal;/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/5FB3C875071AE4B9B2646BAE5AEBD870.png title=3.png style=white-space: normal;/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/A2FD86B4633AC9A2BB900CEB3192861C.png title=4.png style=white-space: normal;/>