【单选题】
<imgwidth="14"height="14"v:shapes="_x0000_i1208"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image301.png">张奖券中含有<imgwidth="17"height="15"v:shapes="_x0000_i1209"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image303.png">张有奖的，今有<imgwidth="13"height="19"v:shapes="_x0000_i1210"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image305.png">个人每人购买1张，则其中至少有1个人中奖的概率为（）
①
<imgwidth="26"height="46"v:shapes="_x0000_i1211"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image307.png">
②
<imgwidth="56"height="48"v:shapes="_x0000_i1212"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image309.png">
③
<imgwidth="55"height="48"v:shapes="_x0000_i1213"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image311.png">
④
<imgwidth="46"height="48"v:shapes="_x0000_i1214"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image313.png">
【单选题】
称<imgwidth="86"height="22"v:shapes="_x0000_i1305"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image377.png">是来自总体<imgwidth="14"height="12"v:shapes="_x0000_i1306"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image341.png">的一个简单随机样本（简称样本），即<imgwidth="86"height="22"v:shapes="_x0000_i1307"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image377.png">满足（）
①
<imgwidth="86"height="22"v:shapes="_x0000_i1308"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image377.png">相互独立，不一定同分布
②
<imgwidth="86"height="22"v:shapes="_x0000_i1309"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image377.png">相互独立同分布，但与总体分布不一定相同
③
<imgwidth="86"height="22"v:shapes="_x0000_i1310"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image377.png">相互独立且均与总体同分布
④
<imgwidth="86"height="22"v:shapes="_x0000_i1311"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image377.png">与总体同分布，但不一定相互独立
【单选题】
向量组<imgwidth="124"height="28"v:shapes="_x0000_i1096"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image122.png">和向量组<imgwidth="132"height="28"v:shapes="_x0000_i1097"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image124.png">等价的定义是向量组（）
①
<imgwidth="26"height="28"v:shapes="_x0000_i1098"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image126.png">和<imgwidth="34"height="28"v:shapes="_x0000_i1099"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image128.png">可互相线性表出
②
<imgwidth="26"height="28"v:shapes="_x0000_i1100"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image126.png">和<imgwidth="34"height="28"v:shapes="_x0000_i1101"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image128.png">中有一组可由另一组线性表出
③
<imgwidth="26"height="28"v:shapes="_x0000_i1102"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image126.png">和<imgwidth="34"height="28"v:shapes="_x0000_i1103"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image128.png">中所含向量的个数相等
④
<imgwidth="26"height="28"v:shapes="_x0000_i1104"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image126.png">和<imgwidth="34"height="28"v:shapes="_x0000_i1105"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image128.png">的秩相等
【单选题】
设随机变量X的概率密度函数为<imgwidth="36"height="21"v:shapes="_x0000_i1112"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image139.png">，且<imgwidth="88"height="27"v:shapes="_x0000_i1113"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image141.png">，则必有（）
①
<imgwidth="36"height="21"v:shapes="_x0000_i1114"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image139.png">在<imgwidth="50"height="27"v:shapes="_x0000_i1115"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image144.png">内大于零
②
<imgwidth="36"height="21"v:shapes="_x0000_i1116"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image139.png">在<imgwidth="50"height="27"v:shapes="_x0000_i1117"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image147.png">内小于零
③
<imgwidth="90"height="35"v:shapes="_x0000_i1118"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image149.png">
④
<imgwidth="36"height="21"v:shapes="_x0000_i1119"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image139.png">在<imgwidth="50"height="27"v:shapes="_x0000_i1120"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image144.png">上单调增加
【单选题】
设离散的随机变量X的分布为<imgwidth="222"height="27"v:shapes="_x0000_i1155"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image211.png">则<imgwidth="27"height="19"v:shapes="_x0000_i1156"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image213.png">（）
①
<imgwidth="32"height="19"v:shapes="_x0000_i1157"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image215.png">
②
任意正实数
③
<imgwidth="35"height="41"v:shapes="_x0000_i1158"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image217.png">
④
<imgwidth="35"height="41"v:shapes="_x0000_i1159"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image219.png">
【单选题】
<imgwidth="19"height="17"v:shapes="_x0000_i1194"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image262.png">为连续型随机变量，<imgwidth="36"height="21"v:shapes="_x0000_i1195"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image288.png">为其概率密度函数，则（）
①
<imgwidth="83"height="21"v:shapes="_x0000_i1196"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image290.png">
②
<imgwidth="56"height="21"v:shapes="_x0000_i1197"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image292.png">
③
<imgwidth="112"height="21"v:shapes="_x0000_i1198"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image294.png">
④
<imgwidth="59"height="21"v:shapes="_x0000_i1199"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image296.png">
【单选题】
设<imgwidth="14"height="16"v:shapes="_x0000_i1136"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image002.png">阶可逆矩阵<imgwidth="18"height="18"v:shapes="_x0000_i1137"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image091.png">有一个特征值为2，对应的特征向量为<imgwidth="14"height="16"v:shapes="_x0000_i1138"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image120.png">，则下列等式中不正确的是（）
①
<imgwidth="64"height="20"v:shapes="_x0000_i1139"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image122.png">
②
<imgwidth="80"height="46"v:shapes="_x0000_i1140"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image124.png">
③
<imgwidth="76"height="24"v:shapes="_x0000_i1141"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image126.png">
④
<imgwidth="70"height="24"v:shapes="_x0000_i1142"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image128.png">
【单选题】
<imgwidth="367"height="47"v:shapes="图片_x0020_70"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image077.png">
①
-1
②
1
③
<imgwidth="24"height="20"v:shapes="图片_x0020_71"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image078.png">
④
<imgwidth="13"height="20"v:shapes="图片_x0020_72"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image079.png">
【单选题】
设总体<imgwidth="63"height="20"v:shapes="_x0000_i1122"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image170.png">，则<imgwidth="12"height="14"v:shapes="_x0000_i1123"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image172.png">的矩估计和极大似然估计分别为（）
①
矩估计<imgwidth="40"height="22"v:shapes="_x0000_i1124"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image174.png">极大似然估计<imgwidth="35"height="22"v:shapes="_x0000_i1125"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image176.png">
②
矩估计<imgwidth="46"height="37"v:shapes="_x0000_i1126"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image178.png">极大似然估计<imgwidth="35"height="22"v:shapes="_x0000_i1127"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image176.png">
③
矩估计<imgwidth="46"height="37"v:shapes="_x0000_i1128"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image178.png">极大似然估计<imgwidth="37"height="37"v:shapes="_x0000_i1129"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image180.png">
④
矩估计<imgwidth="40"height="22"v:shapes="_x0000_i1130"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image174.png">极大似然估计<imgwidth="37"height="37"v:shapes="_x0000_i1131"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image180.png">
【单选题】
设<imgwidth="35"height="21"v:shapes="_x0000_i1063"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image070.png">为随机变量，且<imgwidth="223"height="21"v:shapes="_x0000_i1064"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image072.png">则<imgwidth="84"height="21"v:shapes="_x0000_i1065"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image046.png">（）
①
1
②
2
③
3
④
4
