【简答题】【消耗次数：1】
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相关题目
【填空题】
<img src="http://huaweicloudobs.ahjxjy.cn/3e3876461d74f36955a8ed24ec80025d.png"/>[填空1]
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/17965D156956855FF02D7334DBC8B316.png title=5-B.png alt=5-B.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/E2AB74F09F7E947458371A8BA7D766E4.png title=5-1.png alt=5-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/E38A7D4530F74995190894FABE494819.png title=5-2.png alt=5-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/1EC000176CDF6E5FFE4F59A5CB5840AC.png title=5-3.png alt=5-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/40C31D1F04B2008627E9D157040433CD.png title=5-4.png alt=5-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/F9870941F176D09F73D5E74C1D79952B.png title=10.png alt=10.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/6F30335FEB29073B9897208085365C1C.png title=10-1.png alt=10-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/3ADD7B4764D7D9E623348552CED2A689.png title=10-2.png alt=10-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/7A15D5747FE9385F17D2FAFB390AA203.png title=10-3.png alt=10-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/BAA9B42575637AE6FAB4ED803F189A85.png title=10-4.png alt=10-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/05F1E336D4DB1D8D74DE53F521940B0C.png title=6.png alt=6.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/1EE9E836B7A4EC23DA3213A20979B67A.png title=6-1.png alt=6-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/A18AEB55D7B2E139EA54F72F0E2996C0.png title=6-2.png alt=6-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/A25EC92ACC9E5BBD1359C04717718823.png title=6-3.png alt=6-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/A2A8F239096DC2B1B464A725092429AE.png title=6-4.png alt=6-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/1F4B5F9129D68689D5D776E1A73A74A2.png title=3-B.png alt=3-B.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/CC85925DE84D7639CD4079735B1F3D34.png title=3-1.png alt=3-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/0181D8917B3436BEDB71C337F35C6AFA.png title=3-2.png alt=3-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/926E07E2EB13E6D49E072661C62F9971.png title=3-3.png alt=3-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/647A2838B1CCCE4C727369C438197A00.png title=3-4.png alt=3-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/AB649865829A0B9FFE193F21145F8026.png title=8-D.png alt=8-D.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/9DC1F93D675F07FD735BCBC61C84A68F.png title=8-1.png alt=8-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/C66189E3E1B25079E0220FF593F16CC7.png title=8-2.png alt=8-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/C70B2C3237C37C7C88FE7BB7A435F6D9.png title=8-3.png alt=8-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/D95F26728DC3BF70AAA4EE3DB67A0E94.png title=8-4.png alt=8-4.png/>
【单选题】
<img src=http://huaweicloudobs.ahjxjy.cn/a080467469e22f5b0fb27c1d99c40d0f.png/>
①
<img src=http://huaweicloudobs.ahjxjy.cn/9477aca1087074e00e2a9aa81e6f82a4.png/>
②
<img src=http://huaweicloudobs.ahjxjy.cn/7300a69b568e83957ca08d58818600f4.png/>
③
<img src=http://huaweicloudobs.ahjxjy.cn/819b1f79f280ea88f3f4aa4e715889c7.png/>
④
<img src=http://huaweicloudobs.ahjxjy.cn/a3f446159e7b06239bdb329970ac9df1.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/9390B8DF9AC363D7448D30D6335244B3.png title=16.png alt=16.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/C433D956C1F656AC0BCE2A539E253C08.png title=16-1.png alt=16-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/84FF4CAE0B81F8FC763A9D835C8C1A92.png title=16-2.png alt=16-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/F6DEB47EC27D65B70269A1D87733EBED.png title=16-3.png alt=16-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/646E1EA1066CCFF0C88AC4CFBAB43D35.png title=16-4.png alt=16-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/D22ABC438DDE70164087B9EC079F2D1B.png title=30.png alt=30.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/8519E83401C77186D642C86C7CB7CB2D.png title=30-1.png alt=30-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/1AAEC35890EBEAC2E29FD77A17C63001.png title=30-2.png alt=30-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/733F6FD52DC6C80E8A17EA04F60488F8.png title=30-3.png alt=30-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/043B97756425D8F83F292D404D0926C8.png title=30-4.png alt=30-4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/39D0B6FD2F105295D2E7B3F4474B6D31.png title=8.png alt=8.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/9456BC8D59E40819DA015F6911144529.png title=8-1.png alt=8-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/86BEC2C817D335A74407257FE446EA35.png title=8-2.png alt=8-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/0BDFD407DDB9BFB1A011EB66F473DEAE.png title=8-3.png alt=8-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/BF0F13738EE41CD7F9FA041535913137.png title=8-4.png alt=8-4.png/>
随机题目
【单选题】
下列函数中可以作为某个二维随机变量的分布函数的是（）
①
<imgwidth="151"height="48"v:shapes="_x0000_i1294"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image463.png">
②
<imgwidth="152"height="48"v:shapes="_x0000_i1295"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image465.png">
③
<imgwidth="178"height="46"v:shapes="_x0000_i1296"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image467.png">
④
<imgwidth="260"height="49"v:shapes="_x0000_i1297"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image469.png">
【单选题】
已知随机变量<imgwidth="77"height="21"v:shapes="_x0000_i1134"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image174.png">，则随机变量<imgwidth="73"height="17"v:shapes="_x0000_i1135"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image176.png">的概率密度<imgwidth="54"height="25"v:shapes="_x0000_i1136"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image178.png">（）
①
<imgwidth="131"height="49"v:shapes="_x0000_i1137"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image180.png">
②
<imgwidth="123"height="49"v:shapes="_x0000_i1138"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image182.png">
③
<imgwidth="88"height="49"v:shapes="_x0000_i1139"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image184.png">
④
<imgwidth="123"height="49"v:shapes="_x0000_i1140"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image186.png">
【单选题】
设有<imgwidth="22"height="22"v:shapes="_x0000_i1198"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image242.png">中两组基<imgwidth="70"height="26"v:shapes="_x0000_i1199"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image226.png">和<imgwidth="70"height="26"v:shapes="_x0000_i1200"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image244.png">，已知<imgwidth="206"height="28"v:shapes="_x0000_i1201"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image246.png"><imgwidth="70"height="28"v:shapes="_x0000_i1202"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image248.png">；<imgwidth="270"height="28"v:shapes="_x0000_i1203"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image250.png">，则从基<imgwidth="70"height="26"v:shapes="_x0000_i1204"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image226.png">到基<imgwidth="70"height="26"v:shapes="_x0000_i1205"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image244.png">的过渡矩阵为（）
①
<imgwidth="102"height="84"v:shapes="_x0000_i1206"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image252.png">
②
<imgwidth="102"height="84"v:shapes="_x0000_i1207"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image254.png">
③
<imgwidth="112"height="84"v:shapes="_x0000_i1208"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image256.png">
④
<imgwidth="110"height="84"v:shapes="_x0000_i1209"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image258.png">
【单选题】
设总体<imgwidth="14"height="14"v:shapes="_x0000_i1114"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image154.png">的分布函数为<imgwidth="32"height="20"v:shapes="_x0000_i1115"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image156.png">,则总体均值<imgwidth="12"height="18"v:shapes="_x0000_i1116"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image158.png">和方差<imgwidth="18"height="20"v:shapes="_x0000_i1117"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image160.png">的矩估计分别为（）
①
<imgwidth="135"height="42"v:shapes="_x0000_i1118"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image162.png">
②
<imgwidth="173"height="40"v:shapes="_x0000_i1119"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image164.png">
③
<imgwidth="186"height="42"v:shapes="_x0000_i1120"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image166.png">
④
<imgwidth="156"height="40"v:shapes="_x0000_i1121"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image168.png">
【单选题】
<imgwidth="480"height="66"v:shapes="图片_x0020_110"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image117.png">
①
<imgwidth="62"height="26"v:shapes="图片_x0020_111"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image118.png">
②
<imgwidth="65"height="27"v:shapes="图片_x0020_112"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image119.png">
③
<imgwidth="57"height="27"v:shapes="图片_x0020_113"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image120.png">
④
<imgwidth="63"height="24"v:shapes="图片_x0020_114"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image121.png">
【单选题】
实二次型<imgwidth="170"height="28"v:shapes="_x0000_i1222"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image226.png">为正定的充要条件是（）
①
<imgwidth="18"height="24"v:shapes="_x0000_i1223"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image228.png">的秩为<imgwidth="14"height="16"v:shapes="_x0000_i1224"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image188.png">
②
<imgwidth="18"height="24"v:shapes="_x0000_i1225"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image228.png">的正惯性指数为<imgwidth="14"height="16"v:shapes="_x0000_i1226"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image188.png">
③
<imgwidth="18"height="24"v:shapes="_x0000_i1227"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image228.png">的正惯性指数等于<imgwidth="18"height="24"v:shapes="_x0000_i1228"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image228.png">的秩
④
<imgwidth="18"height="24"v:shapes="_x0000_i1229"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image228.png">的负惯性指数为<imgwidth="14"height="16"v:shapes="_x0000_i1230"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image188.png">
【单选题】
设<imgwidth="54"height="20"v:shapes="_x0000_i1044"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image024.png">是一非齐次线性方程组，<imgwidth="42"height="26"v:shapes="_x0000_i1045"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image026.png">是其任意2个解，则下列结论错误的是（）
①
<imgwidth="52"height="26"v:shapes="_x0000_i1046"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image028.png">是<imgwidth="54"height="20"v:shapes="_x0000_i1047"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image030.png">的一个解
②
<imgwidth="80"height="46"v:shapes="_x0000_i1048"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image032.png">是<imgwidth="54"height="20"v:shapes="_x0000_i1049"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image024.png">的一个解
③
<imgwidth="52"height="26"v:shapes="_x0000_i1050"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image034.png">是<imgwidth="54"height="20"v:shapes="_x0000_i1051"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image030.png">的一个解
④
<imgwidth="62"height="26"v:shapes="_x0000_i1052"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image036.png">是<imgwidth="54"height="20"v:shapes="_x0000_i1053"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image024.png">的一个解
【单选题】
设总体<imgwidth="14"height="12"v:shapes="_x0000_i1291"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image377.png">为参数<imgwidth="12"height="14"v:shapes="_x0000_i1292"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image378.png">的动态分布，今测得<imgwidth="14"height="12"v:shapes="_x0000_i1293"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image377.png">的样本观测值为0.1,0.2,0.3,0.4，则参数<imgwidth="12"height="14"v:shapes="_x0000_i1294"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image378.png">的矩估计值<imgwidth="12"height="22"v:shapes="_x0000_i1295"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image380.png">为（）
①
0.2
②
0.25
③
1
④
4
【单选题】
若<imgwidth="14"height="16"v:shapes="_x0000_i1178"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image188.png">阶可逆矩阵<imgwidth="18"height="18"v:shapes="_x0000_i1179"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image189.png">与<imgwidth="18"height="18"v:shapes="_x0000_i1180"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image190.png">相似，且<imgwidth="56"height="22"v:shapes="_x0000_i1181"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image192.png">则<imgwidth="40"height="22"v:shapes="_x0000_i1182"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image194.png">（）
①
<imgwidth="30"height="18"v:shapes="_x0000_i1183"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image196.png">
②
<imgwidth="28"height="18"v:shapes="_x0000_i1184"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image198.png">
③
<imgwidth="18"height="18"v:shapes="_x0000_i1185"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image190.png">
④
<imgwidth="26"height="22"v:shapes="_x0000_i1186"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image201.png">
【单选题】
设<imgwidth="83"height="25"v:shapes="_x0000_i1163"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image233.png">则下列式中不成立的是（）
①
<imgwidth="46"height="21"v:shapes="_x0000_i1164"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image235.png">
②
<imgwidth="49"height="21"v:shapes="_x0000_i1165"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image237.png">
③
<imgwidth="84"height="27"v:shapes="_x0000_i1166"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image239.png">
④
<imgwidth="87"height="41"v:shapes="_x0000_i1167"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image241.png">