【单选题】
设随机变量<imgwidth="90"height="25"v:shapes="_x0000_i1078"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image084.png">,则<imgwidth="74"height="19"v:shapes="_x0000_i1079"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image086.png">服从()
①
<imgwidth="64"height="25"v:shapes="_x0000_i1080"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image088.png">
②
<imgwidth="48"height="21"v:shapes="_x0000_i1081"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image090.png">
③
<imgwidth="80"height="41"v:shapes="_x0000_i1082"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image092.png">
④
<imgwidth="108"height="25"v:shapes="_x0000_i1083"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image094.png">
【单选题】
下列结论正确的是()
④
<imgwidth="214"height="22"v:shapes="图片_x0020_120"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image127.png">
【单选题】
齐次线性方程组<imgwidth="60"height="20"v:shapes="_x0000_i1362"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image448.png">,其中<imgwidth="18"height="18"v:shapes="_x0000_i1363"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image110.png">是<imgwidth="38"height="20"v:shapes="_x0000_i1364"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image451.png">的矩阵,<imgwidth="22"height="18"v:shapes="_x0000_i1365"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image453.png">是<imgwidth="36"height="18"v:shapes="_x0000_i1366"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image455.png">的列向量则()
【单选题】
<imgwidth="223"height="87"v:shapes="图片_x0020_131"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image129.png">
①
<imgwidth="219"height="34"v:shapes="图片_x0020_132"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image130.png">
②
<imgwidth="53"height="31"v:shapes="图片_x0020_133"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image131.png">
③
<imgwidth="90"height="33"v:shapes="图片_x0020_134"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image132.png">
④
<imgwidth="57"height="26"v:shapes="图片_x0020_135"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image133.png">
【单选题】
设随机变量X服从参数<imgwidth="39"height="19"v:shapes="_x0000_i1173"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image246.png">的泊松分布,<imgwidth="36"height="21"v:shapes="_x0000_i1174"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image248.png">为X的分布函数,则下列正确的是()
①
<imgwidth="67"height="25"v:shapes="_x0000_i1175"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image250.png">
②
<imgwidth="69"height="25"v:shapes="_x0000_i1176"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image252.png">
③
<imgwidth="144"height="27"v:shapes="_x0000_i1177"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image254.png">
④
<imgwidth="107"height="27"v:shapes="_x0000_i1178"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image256.png">
【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">