成考院校在线答案
- 2024-03-05 [单选] <p class="MsoNormal">15、<span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">设二维随机变量</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:6.0pt;mso-text-raise:-6.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1135" type="#_x0000_t75" style='width:140.4pt;height:19.2pt' o:ole=""> <v:imagedata src="xxdsb08.files/image188.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="187" height="26" v:shapes="_x0000_i1135" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image189.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1135" DrawAspect="Content" ObjectID="_1604819091"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">，且</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:2.0pt;mso-text-raise:-2.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1136" type="#_x0000_t75" style='width:14.4pt;height:12.6pt' o:ole=""> <v:imagedata src="xxdsb08.files/image183.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="19" height="17" v:shapes="_x0000_i1136" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image127.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1136" DrawAspect="Content" ObjectID="_1604819092"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">与</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:2.0pt;mso-text-raise:-2.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1137" type="#_x0000_t75" style='width:11.4pt;height:12.6pt' o:ole=""> <v:imagedata src="xxdsb08.files/image184.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="15" height="17" v:shapes="_x0000_i1137" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image185.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1137" DrawAspect="Content" ObjectID="_1604819093"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">相互独立，则（</span><span style="font-size:12.0pt"> </span><span style="font-size:12.0pt;font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt"> <o:p></o:p></span></p>
- 2024-03-05 [单选] <p class="MsoNormal">17、<span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">设随机变量</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:5.0pt;mso-text-raise:-5.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1215" type="#_x0000_t75" style='width:60pt;height:15.6pt' o:ole=""> <v:imagedata src="xxdsb07.files/image326.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="80" height="21" v:shapes="_x0000_i1215" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image327.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1215" DrawAspect="Content" ObjectID="_1604819130"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">，则</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:7.0pt;mso-text-raise:-7.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1216" type="#_x0000_t75" style='width:77.4pt;height:20.4pt' o:ole=""> <v:imagedata src="xxdsb07.files/image328.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="103" height="27" v:shapes="_x0000_i1216" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image329.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1216" DrawAspect="Content" ObjectID="_1604819131"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">（</span><span style="font-size:12.0pt"> </span><span style="font-size:12.0pt;font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt"> <o:p></o:p></span></p>
- 2024-03-05 [单选] <p class="MsoNormal">6、<span lang="EN-US"> <!--[if gte vml 1]><v:shape id="图片_x0020_186" o:spid="_x0000_i1208" type="#_x0000_t75" style='width:438pt;height:24.6pt; mso-position-horizontal-relative:page;mso-position-vertical-relative:page'> <v:imagedata src="xxds01.files/image185.png" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="584" height="33" v:shapes="图片_x0020_186" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image185.png"> <!--[endif]--></span></p>
- 2024-03-05 [单选] <p class="MsoNormal" style="line-height:20.0pt;mso-line-height-rule:exactly">19、<span lang="EN-US"> <!--[if gte vml 1]><v:shape id="图片_x0020_162" o:spid="_x0000_i1186" type="#_x0000_t75" style='width:365.4pt;height:27.6pt; mso-position-horizontal-relative:page;mso-position-vertical-relative:page'> <v:imagedata src="xxds02.files/image168.png" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="487" height="37" v:shapes="图片_x0020_162" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image168.png"> <!--[endif]--></span><span lang="EN-US" style="mso-bidi-font-size:10.5pt"> <o:p></o:p></span></p>
- 2024-03-05 [单选] <p class="MsoNormal">37、<span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">设随机变量</span><span lang="EN-US" style="font-size:12.0pt">X</span><span style="font-size:12.0pt; font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">的期望</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative;top:5.0pt;mso-text-raise:-5.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1042" type="#_x0000_t75" style='width:30.6pt;height:15.6pt' o:ole=""> <v:imagedata src="xxdsb09.files/image027.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="41" height="21" v:shapes="_x0000_i1042" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image028.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1042" DrawAspect="Content" ObjectID="_1604819115"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">和方差</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:5.0pt;mso-text-raise:-5.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1043" type="#_x0000_t75" style='width:31.8pt;height:15.6pt' o:ole=""> <v:imagedata src="xxdsb09.files/image029.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="42" height="21" v:shapes="_x0000_i1043" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image030.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1043" DrawAspect="Content" ObjectID="_1604819116"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">都存在，则对任意正数</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:3.0pt;mso-text-raise:-3.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1044" type="#_x0000_t75" style='width:9.6pt;height:11.4pt' o:ole=""> <v:imagedata src="xxdsb09.files/image031.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="13" height="15" v:shapes="_x0000_i1044" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image032.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1044" DrawAspect="Content" ObjectID="_1604819117"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">，有（</span><span style="font-size:12.0pt"> </span><span style="font-size:12.0pt;font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt"> <o:p></o:p></span></p>
- 2024-03-05 [单选] <p class="MsoNormal" align="left" style="text-align:left;mso-pagination:widow-orphan; vertical-align:middle">26、<span lang="EN-US"> <!--[if gte vml 1]><v:shape id="图片_x0020_7" o:spid="_x0000_i1031" type="#_x0000_t75" style='width:166.8pt;height:87pt; mso-position-horizontal-relative:page;mso-position-vertical-relative:page'> <v:imagedata src="xxds01.files/image007.png" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="222" height="116" v:shapes="图片_x0020_7" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image007.png"> <!--[endif]--></span><span lang="EN-US" style="mso-bidi-font-size:10.5pt"> <o:p></o:p></span></p>
- 2024-03-05 [单选] <p class="MsoNormal" style="line-height:150%">40、<span style="font-size:12.0pt; line-height:150%;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman";mso-font-kerning:0pt">已知</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%"><span style="position: relative;top:6.0pt;mso-text-raise:-6.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1057" type="#_x0000_t75" style='width:262.2pt;height:19.2pt' o:ole=""> <v:imagedata src="xxds03.files/image051.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="350" height="26" v:shapes="_x0000_i1057" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image052.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1057" DrawAspect="Content" ObjectID="_1604818781"> </o:OLEObject> </xml><![endif]--><span style="mso-spacerun:yes"> </span><span style="position:relative;top:6.0pt;mso-text-raise:-6.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1058" type="#_x0000_t75" style='width:94.8pt;height:19.2pt' o:ole=""> <v:imagedata src="xxds03.files/image053.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="126" height="26" v:shapes="_x0000_i1058" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image054.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1058" DrawAspect="Content" ObjectID="_1604818782"> </o:OLEObject> </xml><![endif]--></span><span lang="EN-US" style="font-size:12.0pt;line-height: 150%;mso-font-kerning:0pt"> <o:p></o:p></span></p> <p class="MsoNormal" style="line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height:150%"><span style="position:relative; top:6.0pt;mso-text-raise:-6.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1059" type="#_x0000_t75" style='width:93pt;height:19.2pt' o:ole=""> <v:imagedata src="xxds03.files/image055.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="124" height="26" v:shapes="_x0000_i1059" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image056.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1059" DrawAspect="Content" ObjectID="_1604818783"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;line-height:150%; font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">，则该向量组的秩为（</span><span style="font-size:12.0pt;line-height: 150%"> </span><span style="font-size:12.0pt;line-height:150%;font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%"> <o:p></o:p></span></p>
- 2024-03-05 [单选] <p class="MsoNormal" style="line-height:150%">35、<span style="font-size:12.0pt; line-height:150%;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman";mso-font-kerning:0pt">设向量组</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%"><span style="position: relative;top:7.0pt;mso-text-raise:-7.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1135" type="#_x0000_t75" style='width:93pt;height:21pt' o:ole=""> <v:imagedata src="xxds03.files/image121.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="124" height="28" v:shapes="_x0000_i1135" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image161.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1135" DrawAspect="Content" ObjectID="_1604818860"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;line-height:150%; font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">可由向量组</span><span lang="EN-US" style="font-size:12.0pt; line-height:150%"><span style="position:relative;top:7.0pt;mso-text-raise: -7.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1136" type="#_x0000_t75" style='width:99pt;height:21pt' o:ole=""> <v:imagedata src="xxds03.files/image123.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="132" height="28" v:shapes="_x0000_i1136" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image162.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1136" DrawAspect="Content" ObjectID="_1604818861"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;line-height:150%; font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">线性表示，则（</span><span style="font-size:12.0pt;line-height: 150%"> </span><span style="font-size:12.0pt;line-height:150%;font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%;mso-font-kerning:0pt"> <o:p></o:p></span></p>
- 2024-03-05 [单选] <p class="MsoNormal">2、<span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">某类钢板的制造规格规定，钢板重量的方差不得超过</span><span lang="EN-US" style="font-size:12.0pt">0.016(</span><span style="font-size:12.0pt; font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">千克</span><span lang="EN-US" style="font-size:12.0pt">)<sup>2</sup></span><span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">，由</span><span lang="EN-US" style="font-size:12.0pt">25</span><span style="font-size:12.0pt;font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">块钢板组成的一个随机样本给出样本方差为</span><span lang="EN-US" style="font-size:12.0pt">0.025(</span><span style="font-size:12.0pt; font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">千克</span><span lang="EN-US" style="font-size:12.0pt">)<sup>2</sup>.</span><span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">则在显著水平</span><span lang="EN-US" style="font-size:12.0pt;position:relative;top:3.0pt;mso-text-raise:-3.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1336" type="#_x0000_t75" style='width:9pt;height:9pt'> <v:imagedata src="xxdsb11.files/image439.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="12" height="12" v:shapes="_x0000_i1336" src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image440.png"> <!--[endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">下，为检验钢板是否合格，用</span><span lang="EN-US" style="font-size:12.0pt;position:relative;top:5.0pt;mso-text-raise: -5.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1337" type="#_x0000_t75" style='width:9pt;height:16.8pt'> <v:imagedata src="xxdsb11.files/image441.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="12" height="22" v:shapes="_x0000_i1337" src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image442.png"> <!--[endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">检验，则拒绝域为（</span><span style="font-size:12.0pt"> </span><span style="font-size:12.0pt;font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt"> <o:p></o:p></span></p>
- 2024-03-05 [单选] <p class="MsoNormal">38、<span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman";mso-font-kerning: 0pt">矩阵（</span><span style="font-size:12.0pt;mso-font-kerning:0pt"> </span><span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman";mso-font-kerning:0pt">）合同于</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:37.0pt;mso-text-raise:-37.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1278" type="#_x0000_t75" style='width:73.2pt;height:81pt' o:ole=""> <v:imagedata src="xxds05.files/image303.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="98" height="108" v:shapes="_x0000_i1278" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image304.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1278" DrawAspect="Content" ObjectID="_1604819089"> </o:OLEObject> </xml><![endif]--></span></p>