【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】
设<imgwidth="73"height="21"v:shapes="_x0000_i1028"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image002.png">，则（）
①
A和B不相容
②
A和B相互独立
③
<imgwidth="61"height="21"v:shapes="_x0000_i1025"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image004.png">或<imgwidth="61"height="21"v:shapes="_x0000_i1026"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image006.png">
④
<imgwidth="111"height="21"v:shapes="_x0000_i1027"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image008.png">
【单选题】
设<imgwidth="70"height="26"v:shapes="_x0000_i1082"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image096.png">是方程组<imgwidth="60"height="20"v:shapes="_x0000_i1083"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image098.png">的基础解系，则下列向量组中也可作为<imgwidth="60"height="20"v:shapes="_x0000_i1084"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image098.png">的基础解系的是（）
①
<imgwidth="174"height="26"v:shapes="_x0000_i1085"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image100.png">
②
<imgwidth="222"height="26"v:shapes="_x0000_i1086"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image102.png">
③
<imgwidth="138"height="26"v:shapes="_x0000_i1087"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image104.png">
④
<imgwidth="140"height="26"v:shapes="_x0000_i1088"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image106.png">
【判断题】
设<imgwidth="69"height="21"v:shapes="对象_x0020_24"src="http://wljy.whut.edu.cn:80/uploadfiles/word/lssxpdt.files/image022.png">，<imgwidth="88"height="24"v:shapes="对象_x0020_25"src="http://wljy.whut.edu.cn:80/uploadfiles/word/lssxpdt.files/image024.png">，则<imgwidth="105"height="25"v:shapes="对象_x0020_26"src="http://wljy.whut.edu.cn:80/uploadfiles/word/lssxpdt.files/image026.png">
①
正确
②
错误
【单选题】
<imgwidth="497"height="76"v:shapes="图片_x0020_82"src="http://wljy.whut.edu.cn/uploadfiles/word/cyy02-60.files/image077.png">
①
<imgwidth="56"height="18"v:shapes="图片_x0020_83"src="http://wljy.whut.edu.cn/uploadfiles/word/cyy02-60.files/image078.png">
②
<imgwidth="36"height="26"v:shapes="图片_x0020_84"src="http://wljy.whut.edu.cn/uploadfiles/word/cyy02-60.files/image079.png">
③
<imgwidth="26"height="39"v:shapes="图片_x0020_85"src="http://wljy.whut.edu.cn/uploadfiles/word/cyy02-60.files/image080.png">
④
<imgwidth="40"height="33"v:shapes="图片_x0020_86"src="http://wljy.whut.edu.cn/uploadfiles/word/cyy02-60.files/image081.png">
【单选题】
随机变量X服从正态分布<imgwidth="64"height="25"v:shapes="_x0000_i1160"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image113.png">，则随着<imgwidth="16"height="15"v:shapes="_x0000_i1161"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image222.png">的增大，概率<imgwidth="103"height="27"v:shapes="_x0000_i1162"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image224.png">（）
①
单调增大
②
单调减小
③
保持不变
④
增减不定
【单选题】
有放回地抽取500件产品，<imgwidth="19"height="17"v:shapes="_x0000_i1061"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image002.png">表示抽到次品的件数，则<imgwidth="77"height="21"v:shapes="_x0000_i1062"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image074.png">（）
①
<imgwidth="55"height="48"v:shapes="_x0000_i1063"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image076.png">
②
<imgwidth="54"height="48"v:shapes="_x0000_i1064"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image078.png">
③
<imgwidth="128"height="26"v:shapes="_x0000_i1065"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image080.png">
④
<imgwidth="30"height="41"v:shapes="_x0000_i1066"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image082.png">
【单选题】
设<imgwidth="51"height="25"v:shapes="_x0000_i1039"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image020.png">为相互独立的随机变量，且<imgwidth="183"height="26"v:shapes="_x0000_i1040"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image024.png">，则<imgwidth="146"height="25"v:shapes="_x0000_i1041"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image026.png">分别为（）
①
5，7
②
5，25
③
5，5
④
6，5
【单选题】
设<imgwidth="106"height="25"v:shapes="_x0000_i1066"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image071.png">，则服从<imgwidth="19"height="17"v:shapes="_x0000_i1067"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image002.png">（）分布
①
正态
②
指数
③
二项
④
泊松
【单选题】
矩阵（）合同于<imgwidth="98"height="108"v:shapes="_x0000_i1278"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image304.png">
①
<imgwidth="94"height="84"v:shapes="_x0000_i1279"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image306.png">
②
<imgwidth="94"height="84"v:shapes="_x0000_i1280"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image308.png">
③
<imgwidth="110"height="84"v:shapes="_x0000_i1281"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image310.png">
④
<imgwidth="84"height="84"v:shapes="_x0000_i1282"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image312.png">
