【单选题】【消耗次数：1】
设<imgwidth="75"height="22"v:shapes="_x0000_i1220"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image314.png">是来自正态总体<imgwidth="60"height="22"v:shapes="_x0000_i1221"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image290.png">的样本，则<imgwidth="98"height="40"v:shapes="_x0000_i1222"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image316.png">服从的分布为（）
①
<imgwidth="37"height="22"v:shapes="_x0000_i1223"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image318.png">
②
<imgwidth="58"height="22"v:shapes="_x0000_i1224"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image320.png">
③
<imgwidth="63"height="40"v:shapes="_x0000_i1225"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image321.png">
④
<imgwidth="63"height="40"v:shapes="_x0000_i1226"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image321.png">
参考答案：
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相关题目
【单选题】
设总体<imgwidth="86"height="22"v:shapes="_x0000_i1257"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image373.png">，其中<imgwidth="35"height="22"v:shapes="_x0000_i1258"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image375.png">已知，<imgwidth="86"height="22"v:shapes="_x0000_i1259"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image377.png"><imgwidth="46"height="18"v:shapes="_x0000_i1260"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image379.png">为来自总体<imgwidth="14"height="12"v:shapes="_x0000_i1261"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image341.png">的样本，<imgwidth="14"height="18"v:shapes="_x0000_i1262"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image382.png">为样本均值，<imgwidth="12"height="20"v:shapes="_x0000_i1263"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image384.png">为样本方差，则下列统计量中服从<imgwidth="9"height="18"v:shapes="_x0000_i1264"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image386.png">分布的是（）
①
<imgwidth="75"height="69"v:shapes="_x0000_i1265"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image388.png">
②
<imgwidth="75"height="69"v:shapes="_x0000_i1266"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image390.png">
③
<imgwidth="75"height="73"v:shapes="_x0000_i1267"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image392.png">
④
<imgwidth="53"height="86"v:shapes="_x0000_i1268"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image394.png">
【单选题】
设<imgwidth="112"height="21"v:shapes="_x0000_i1027"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image004.png">，即<imgwidth="13"height="15"v:shapes="_x0000_i1028"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image006.png">服从参数为<imgwidth="15"height="19"v:shapes="_x0000_i1029"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image008.png">的泊松分布，则<imgwidth="51"height="44"v:shapes="_x0000_i1030"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image010.png">（）
①
1
②
<imgwidth="15"height="18"v:shapes="_x0000_i1031"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image012.png">
③
2
④
4
【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】
设随机变量<imgwidth="13"height="15"v:shapes="_x0000_i1216"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image328.png">和<imgwidth="13"height="17"v:shapes="_x0000_i1217"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image330.png">的密度函数分别为<imgwidth="131"height="48"v:shapes="_x0000_i1218"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image332.png"><imgwidth="140"height="50"v:shapes="_x0000_i1219"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image334.png">若<imgwidth="13"height="15"v:shapes="_x0000_i1220"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image328.png">与<imgwidth="13"height="17"v:shapes="_x0000_i1221"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image330.png">相互独立，则<imgwidth="57"height="21"v:shapes="_x0000_i1222"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image336.png">（）
①
1
②
<imgwidth="16"height="41"v:shapes="_x0000_i1223"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image338.png">
③
<imgwidth="15"height="41"v:shapes="_x0000_i1224"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image340.png">
④
<imgwidth="16"height="41"v:shapes="_x0000_i1225"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image342.png">
【单选题】
<imgwidth="183"height="25"v:shapes="_x0000_i1194"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image285.png">，且<imgwidth="21"height="25"v:shapes="_x0000_i1195"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image287.png">与<imgwidth="22"height="25"v:shapes="_x0000_i1196"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image289.png">相互独立，则<imgwidth="68"height="25"v:shapes="_x0000_i1197"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image291.png">（）
①
<imgwidth="84"height="25"v:shapes="_x0000_i1198"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image293.png">
②
<imgwidth="92"height="25"v:shapes="_x0000_i1199"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image295.png">
③
<imgwidth="88"height="41"v:shapes="_x0000_i1200"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image297.png">
④
<imgwidth="96"height="41"v:shapes="_x0000_i1201"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image299.png">
【单选题】
对于正态分布<imgwidth="84"height="22"v:shapes="_x0000_i1400"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image525.png">，抽取容量为10的样本，算得样本均值<imgwidth="63"height="20"v:shapes="_x0000_i1401"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image527.png">，样本方差<imgwidth="81"height="20"v:shapes="_x0000_i1402"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image529.png">，给定显著水平<imgwidth="60"height="18"v:shapes="_x0000_i1403"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image531.png">，检验假设<imgwidth="75"height="22"v:shapes="_x0000_i1404"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image533.png"><imgwidth="35"height="22"v:shapes="_x0000_i1405"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image535.png"><imgwidth="58"height="18"v:shapes="_x0000_i1406"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image537.png">.则正确的方法和结论是（）
①
用<imgwidth="12"height="14"v:shapes="_x0000_i1407"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image539.png">检验法，查临界值表知<imgwidth="78"height="22"v:shapes="_x0000_i1408"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image541.png">，拒绝<imgwidth="22"height="22"v:shapes="_x0000_i1409"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image465.png">
②
用<imgwidth="12"height="14"v:shapes="_x0000_i1410"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image539.png">检验法，查临界值表知<imgwidth="75"height="22"v:shapes="_x0000_i1411"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image544.png">，拒绝<imgwidth="22"height="22"v:shapes="_x0000_i1412"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image465.png">
③
用<imgwidth="12"height="14"v:shapes="_x0000_i1413"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image546.png">检验法，查临界值表知<imgwidth="102"height="22"v:shapes="_x0000_i1414"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image548.png">，拒绝<imgwidth="22"height="22"v:shapes="_x0000_i1415"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image465.png">
④
用<imgwidth="12"height="14"v:shapes="_x0000_i1416"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image546.png">检验法，查临界值表知<imgwidth="84"height="22"v:shapes="_x0000_i1417"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image550.png">，拒绝<imgwidth="22"height="22"v:shapes="_x0000_i1418"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image465.png">
【单选题】
设<imgwidth="69"height="22"v:shapes="_x0000_i1152"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image208.png">是来自正态总体<imgwidth="58"height="22"v:shapes="_x0000_i1153"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image210.png">的样本,已知统计量<imgwidth="118"height="22"v:shapes="_x0000_i1154"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image212.png">是方差<imgwidth="18"height="18"v:shapes="_x0000_i1155"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image214.png">的无偏估计量,则常数<imgwidth="12"height="18"v:shapes="_x0000_i1156"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image216.png">等于（）
①
<imgwidth="12"height="37"v:shapes="_x0000_i1157"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image218.png">
②
<imgwidth="12"height="37"v:shapes="_x0000_i1158"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image220.png">
③
2
④
4
【单选题】
设<imgwidth="14"height="22"v:shapes="_x0000_i1181"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image253.png">是<imgwidth="12"height="14"v:shapes="_x0000_i1182"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image255.png">次重复试验中事件<imgwidth="12"height="20"v:shapes="_x0000_i1183"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image257.png">出现的次数，<imgwidth="12"height="18"v:shapes="_x0000_i1184"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image259.png">是事件<imgwidth="12"height="20"v:shapes="_x0000_i1185"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image257.png">在每次试验中出现的概率，则对任意<imgwidth="35"height="22"v:shapes="_x0000_i1186"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image261.png">均有<imgwidth="127"height="42"v:shapes="_x0000_i1187"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image263.png">（）
①
=0
②
=1
③
0
④
不存在
【单选题】
设总体<imgwidth="14"height="14"v:shapes="_x0000_i1273"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image333.png">服从泊松分布：<imgwidth="217"height="40"v:shapes="_x0000_i1274"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image356.png">，其中<imgwidth="32"height="18"v:shapes="_x0000_i1275"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image358.png">为未知参数，<imgwidth="86"height="22"v:shapes="_x0000_i1276"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image336.png">为样本，记<imgwidth="84"height="40"v:shapes="_x0000_i1277"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image360.png">，则下面几种说法错误的是（）
①
<imgwidth="14"height="18"v:shapes="_x0000_i1278"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image362.png">是<imgwidth="12"height="18"v:shapes="_x0000_i1279"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image364.png">的无偏估计
②
<imgwidth="14"height="18"v:shapes="_x0000_i1280"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image362.png">是<imgwidth="12"height="18"v:shapes="_x0000_i1281"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image364.png">的矩估计
③
<imgwidth="14"height="14"v:shapes="_x0000_i1282"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image365.png">是<imgwidth="35"height="20"v:shapes="_x0000_i1283"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image367.png">的矩估计
④
<imgwidth="14"height="20"v:shapes="_x0000_i1284"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image368.png">是<imgwidth="12"height="37"v:shapes="_x0000_i1285"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image370.png">的矩估计
【单选题】
<imgwidth="13"height="21"v:shapes="_x0000_i1174"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image254.png">与<imgwidth="13"height="17"v:shapes="_x0000_i1175"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image256.png">的相关系数<imgwidth="50"height="26"v:shapes="_x0000_i1176"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image258.png">，表示<imgwidth="13"height="21"v:shapes="_x0000_i1177"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image254.png">与<imgwidth="13"height="17"v:shapes="_x0000_i1178"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image256.png">（）
①
相互独立
②
不线性相关
③
存在常数<imgwidth="27"height="21"v:shapes="_x0000_i1179"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image260.png">使<imgwidth="116"height="27"v:shapes="_x0000_i1180"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image262.png">
④
满足<imgwidth="164"height="29"v:shapes="_x0000_i1181"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image264.png">
随机题目