成考院校在线答案
- 2024-03-05 [单选] <p class="MsoNormal">39、<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">下列二次型中，矩阵为</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative;top:28.0pt;mso-text-raise:-28.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1187" type="#_x0000_t75" style='width:76.8pt;height:63pt' o:ole=""> <v:imagedata src="xxds05.files/image202.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="102" height="84" v:shapes="_x0000_i1187" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image203.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1187" DrawAspect="Content" ObjectID="_1604818997"> </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"">的是（</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></p>
- 2024-03-05 [单选] <p class="MsoNormal">3、<span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">已知</span><span lang="EN-US" style="font-size:12.0pt;position:relative;top:6.0pt;mso-text-raise: -6.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1203" type="#_x0000_t75" style='width:56.4pt;height:19.8pt'> <v:imagedata src="xxdsb10.files/image287.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="75" height="26" v:shapes="_x0000_i1203" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image288.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"">是来自正态总体</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_i1204" type="#_x0000_t75" style='width:45pt;height:16.8pt'> <v:imagedata src="xxdsb10.files/image289.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="60" height="22" v:shapes="_x0000_i1204" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image290.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"">的样本</span><span lang="EN-US" 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"">其中</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_i1205" type="#_x0000_t75" style='width:9pt;height:10.8pt'> <v:imagedata src="xxdsb10.files/image291.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="12" height="14" v:shapes="_x0000_i1205" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image292.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"">未知</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_i1206" type="#_x0000_t75" style='width:24pt;height:13.2pt'> <v:imagedata src="xxdsb10.files/image293.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="32" height="18" v:shapes="_x0000_i1206" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image294.png"> <!--[endif]--></span></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"">为已知</span><span lang="EN-US" 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"">则下列关于</span><span lang="EN-US" style="font-size:12.0pt;position:relative;top:6.0pt;mso-text-raise: -6.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1207" type="#_x0000_t75" style='width:56.4pt;height:19.8pt'> <v:imagedata src="xxdsb10.files/image287.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="75" height="26" v:shapes="_x0000_i1207" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image288.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"">的函数不是统计量的为（</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">8、<span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">假设事件</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_i1195" type="#_x0000_t75" style='width:12pt;height:12.6pt' o:ole=""> <v:imagedata src="xxdsb06.files/image264.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="16" height="17" v:shapes="_x0000_i1195" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image265.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1195" DrawAspect="Content" ObjectID="_1604819060"> </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</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_i1196" type="#_x0000_t75" style='width:12pt;height:12.6pt' o:ole=""> <v:imagedata src="xxdsb06.files/image266.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="16" height="17" v:shapes="_x0000_i1196" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image267.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1196" DrawAspect="Content" ObjectID="_1604819061"> </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"">满足</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_i1197" type="#_x0000_t75" style='width:59.4pt;height:15.6pt' o:ole=""> <v:imagedata src="xxdsb06.files/image280.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="79" height="21" v:shapes="_x0000_i1197" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image281.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1197" DrawAspect="Content" ObjectID="_1604819062"> </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 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</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_i1062" type="#_x0000_t75" style='width:24pt;height:15.6pt' o:ole=""> <v:imagedata src="xxdsb07.files/image045.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="32" height="21" v:shapes="_x0000_i1062" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image046.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1062" DrawAspect="Content" ObjectID="_1604818977"> </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"">为随机事件，</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_i1063" type="#_x0000_t75" style='width:105.6pt;height:15.6pt' o:ole=""> <v:imagedata src="xxdsb07.files/image057.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="141" height="21" v:shapes="_x0000_i1063" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image058.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1063" DrawAspect="Content" ObjectID="_1604818978"> </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"">，则必有（</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">7、<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">设</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_i1348" type="#_x0000_t75" style='width:121.8pt;height:19.2pt' o:ole=""> <v:imagedata src="xxds04.files/image447.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="162" height="26" v:shapes="_x0000_i1348" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image448.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1348" DrawAspect="Content" ObjectID="_1604819129"> </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"">是三阶方阵的三个特征值，对应特征向量分别为</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_i1349" type="#_x0000_t75" style='width:46.2pt;height:19.2pt' o:ole=""> <v:imagedata src="xxds04.files/image449.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="62" height="26" v:shapes="_x0000_i1349" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image450.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1349" 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"">，且存在可逆矩阵</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_i1350" type="#_x0000_t75" style='width:12.6pt;height:13.8pt' o:ole=""> <v:imagedata src="xxds04.files/image451.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="17" height="18" v:shapes="_x0000_i1350" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image452.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1350" 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"">，使得</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_i1351" type="#_x0000_t75" style='width:40.2pt;height:16.8pt' o:ole=""> <v:imagedata src="xxds04.files/image453.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="54" height="22" v:shapes="_x0000_i1351" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image390.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1351" DrawAspect="Content" ObjectID="_1604819132"> </o:OLEObject> </xml><![endif]--><span style="position:relative;top:28.0pt;mso-text-raise: -28.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1352" type="#_x0000_t75" style='width:88.2pt;height:63pt' o:ole=""> <v:imagedata src="xxds04.files/image454.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="118" height="84" v:shapes="_x0000_i1352" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image455.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1352" DrawAspect="Content" ObjectID="_1604819133"> </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:2.0pt;mso-text-raise:-2.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1353" type="#_x0000_t75" style='width:24pt;height:13.8pt' o:ole=""> <v:imagedata src="xxds04.files/image456.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="32" height="18" v:shapes="_x0000_i1353" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image457.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1353" DrawAspect="Content" ObjectID="_1604819134"> </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></p>
- 2024-03-05 [单选] <p class="MsoNormal">11、<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</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_i1027" type="#_x0000_t75" style='width:84pt;height:15.6pt' o:ole=""> <v:imagedata src="xxdsb10.files/image003.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="112" height="21" v:shapes="_x0000_i1027" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image004.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1027" DrawAspect="Content" ObjectID="_1604906002"> </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"">，即</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_i1028" type="#_x0000_t75" style='width:9.6pt;height:11.4pt' o:ole=""> <v:imagedata src="xxdsb10.files/image005.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="13" height="15" v:shapes="_x0000_i1028" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image006.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1028" DrawAspect="Content" ObjectID="_1604906003"> </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"">服从参数为</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_i1029" type="#_x0000_t75" style='width:11.4pt;height:14.4pt' o:ole=""> <v:imagedata src="xxdsb10.files/image007.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="15" height="19" v:shapes="_x0000_i1029" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image008.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1029" DrawAspect="Content" ObjectID="_1604906004"> </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"">的泊松分布，则</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:14.0pt;mso-text-raise:-14.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1030" type="#_x0000_t75" style='width:38.4pt;height:33pt' o:ole=""> <v:imagedata src="xxdsb10.files/image009.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="51" height="44" v:shapes="_x0000_i1030" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image010.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1030" DrawAspect="Content" ObjectID="_1604906005"> </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" style="line-height:150%">14、<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"">设</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%;position:relative;top:6.0pt; mso-text-raise:-6.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1303" type="#_x0000_t75" style='width:26.4pt;height:19.8pt'> <v:imagedata src="xxdsb11.files/image293.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="35" height="26" v:shapes="_x0000_i1303" src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image393.png"> <!--[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"">是参数</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%;position:relative; top:3.0pt;mso-text-raise:-3.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1304" type="#_x0000_t75" style='width:9pt;height:13.2pt'> <v:imagedata src="xxdsb11.files/image303.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="12" height="18" v:shapes="_x0000_i1304" src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image373.png"> <!--[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"">的两个相互独立的无偏估计量，且</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%;position:relative; top:6.0pt;mso-text-raise:-6.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1305" type="#_x0000_t75" style='width:80.4pt;height:19.8pt'> <v:imagedata src="xxdsb11.files/image394.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="107" height="26" v:shapes="_x0000_i1305" src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image395.png"> <!--[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"">若</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%;position:relative; top:6.0pt;mso-text-raise:-6.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1306" type="#_x0000_t75" style='width:39.6pt;height:19.8pt'> <v:imagedata src="xxdsb11.files/image396.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="53" height="26" v:shapes="_x0000_i1306" src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image397.png"> <!--[endif]--></span><span lang="EN-US" style="font-size:12.0pt;line-height:150%"> <o:p></o:p></span></p> <p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;position:relative; top:6.0pt;mso-text-raise:-6.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1307" type="#_x0000_t75" style='width:26.4pt;height:19.8pt'> <v:imagedata src="xxdsb11.files/image398.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="35" height="26" v:shapes="_x0000_i1307" src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image399.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"">也是</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_i1308" type="#_x0000_t75" style='width:9pt;height:13.2pt'> <v:imagedata src="xxdsb11.files/image303.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="12" height="18" v:shapes="_x0000_i1308" src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image373.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"">的无偏估计量，则下面四个估计量中方差最小的是（</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_14" o:spid="_x0000_i1038" type="#_x0000_t75" style='width:357pt;height:48pt; mso-position-horizontal-relative:page;mso-position-vertical-relative:page'> <v:imagedata src="xxds02.files/image014.png" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="476" height="64" v:shapes="图片_x0020_14" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image014.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">28、<span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">若</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_i1068" type="#_x0000_t75" style='width:60pt;height:15.6pt' o:ole=""> <v:imagedata src="xxdsb10.files/image072.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="80" height="21" v:shapes="_x0000_i1068" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image073.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1068" DrawAspect="Content" ObjectID="_1604906044"> </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，则下面命题错误的是（</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" style="line-height:150%">2、<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</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%"><span style="position: relative;top:13.0pt;mso-text-raise:-13.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1079" type="#_x0000_t75" style='width:33pt;height:34.8pt' o:ole=""> <v:imagedata src="xxds05.files/image053.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="44" height="46" v:shapes="_x0000_i1079" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image054.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1079" DrawAspect="Content" ObjectID="_1604818888"> </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"">是二阶矩阵</span><span lang="EN-US" style="font-size:12.0pt; line-height:150%"><span style="position:relative;top:2.0pt;mso-text-raise: -2.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1080" type="#_x0000_t75" style='width:13.2pt;height:13.8pt' o:ole=""> <v:imagedata src="xxds05.files/image030.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="18" height="18" v:shapes="_x0000_i1080" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image004.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1080" DrawAspect="Content" ObjectID="_1604818889"> </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"">的两个特征，那么它的特征方程是（</span><span style="font-size:12.0pt; line-height:150%"> </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"">）</span><span lang="EN-US" style="font-size:12.0pt; line-height:150%;mso-font-kerning:0pt"> <o:p></o:p></span></p>