成考院校在线答案
- 2022-09-12 [单选] <p class="MsoNormal" style="line-height:20.0pt;mso-line-height-rule:exactly">10、<span lang="EN-US"> <!--[if gte vml 1]><v:shape id="图片_x0020_142" o:spid="_x0000_i1166" type="#_x0000_t75" style='width:305.4pt;height:20.4pt; mso-position-horizontal-relative:page;mso-position-vertical-relative:page'> <v:imagedata src="xxds02.files/image148.png" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="407" height="27" v:shapes="图片_x0020_142" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image148.png"> <!--[endif]--></span><span lang="EN-US" style="mso-bidi-font-size:10.5pt"> <o:p></o:p></span></p>
- 2022-09-12 [单选] <p class="MsoNormal">32、<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">二次型</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_i1053" type="#_x0000_t75" style='width:210pt;height:21pt' o:ole=""> <v:imagedata src="xxds02.files/image029.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="280" height="28" v:shapes="_x0000_i1053" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image030.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1053" DrawAspect="Content" ObjectID="_1604818726"> </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"">是正定的，则</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_i1054" type="#_x0000_t75" style='width:33pt;height:16.8pt' o:ole=""> <v:imagedata src="xxds02.files/image031.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="44" height="22" v:shapes="_x0000_i1054" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image032.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1054" DrawAspect="Content" ObjectID="_1604818727"> </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"">应满足的条件的是（</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>
- 2022-09-12 [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"">一枚硬币投掷两次，令</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_i1040" type="#_x0000_t75" style='width:24pt;height:18.6pt' o:ole=""> <v:imagedata src="xxdsb06.files/image031.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="32" height="25" v:shapes="_x0000_i1040" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image032.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1040" DrawAspect="Content" ObjectID="_1604818903"> </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"">“第</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_i1041" type="#_x0000_t75" style='width:6.6pt;height:12.6pt' o:ole=""> <v:imagedata src="xxdsb06.files/image033.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="9" height="17" v:shapes="_x0000_i1041" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image034.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1041" DrawAspect="Content" ObjectID="_1604818904"> </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"">次正面朝上”</span><span style="font-size:12.0pt"> <span lang="EN-US"><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:41.4pt;height:15.6pt' o:ole=""> <v:imagedata src="xxdsb06.files/image035.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="55" height="21" v:shapes="_x0000_i1042" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image036.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1042" DrawAspect="Content" ObjectID="_1604818905"> </o:OLEObject> </xml><![endif]--></span></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“至多有一次正面朝上可表示为（</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>
- 2022-09-12 [单选] <p class="MsoNormal">15、<span lang="EN-US"> <!--[if gte vml 1]><v:shape id="图片_x0020_121" o:spid="_x0000_i1146" type="#_x0000_t75" style='width:438pt;height:19.8pt; mso-position-horizontal-relative:page;mso-position-vertical-relative:page'> <v:imagedata src="xxds02.files/image128.png" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="584" height="26" v:shapes="图片_x0020_121" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image128.png"> <!--[endif]--></span></p>
- 2022-09-12 [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:6.0pt;mso-text-raise:-6.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1034" type="#_x0000_t75" style='width:38.4pt;height:18.6pt' o:ole=""> <v:imagedata src="xxdsb09.files/image019.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="51" height="25" v:shapes="_x0000_i1034" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image020.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1034" DrawAspect="Content" ObjectID="_1604819106"> </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"">为两个随机变量，且</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_i1035" type="#_x0000_t75" style='width:42pt;height:19.2pt' o:ole=""> <v:imagedata src="xxdsb09.files/image021.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="56" height="26" v:shapes="_x0000_i1035" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image022.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1035" DrawAspect="Content" ObjectID="_1604819107"> </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>
- 2022-09-12 [单选] <p class="MsoNormal" style="margin-left:30.0pt;text-indent:-30.0pt;mso-char-indent-count: -2.5;line-height:150%">11、<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"">在假设检验中，设</span><span lang="EN-US" style="font-size:12.0pt; line-height:150%;position:relative;top:2.0pt;mso-text-raise:-2.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1346" type="#_x0000_t75" style='width:9pt;height:10.8pt'> <v:imagedata src="xxdsb11.files/image457.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="12" height="14" v:shapes="_x0000_i1346" src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image426.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"">服从正态分布</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%;position:relative; top:5.0pt;mso-text-raise:-5.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1347" type="#_x0000_t75" style='width:43.2pt;height:16.8pt'> <v:imagedata src="xxdsb11.files/image458.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="58" height="22" v:shapes="_x0000_i1347" src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image459.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"">，</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_i1348" type="#_x0000_t75" style='width:15pt;height:15pt'> <v:imagedata src="xxdsb11.files/image460.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="20" height="20" v:shapes="_x0000_i1348" src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image461.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"">未知，假设检验问题为</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%"> <o:p></o:p></span></p> <p class="MsoNormal" style="margin-left:30.0pt;text-indent:-30.0pt;mso-char-indent-count: -2.5;line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height: 150%"><span style="mso-tab-count:1"> </span><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:124.8pt;height:16.8pt'> <v:imagedata src="xxdsb11.files/image462.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="166" height="22" v:shapes="_x0000_i1349" src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image463.png"> <!--[endif]--></span></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"">，则在显著水平</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_i1350" 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_i1350" src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image440.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"">下，</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_i1351" type="#_x0000_t75" style='width:16.8pt;height:16.8pt'> <v:imagedata src="xxdsb11.files/image464.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="22" height="22" v:shapes="_x0000_i1351" src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image465.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"">的拒绝域为（</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%"> <o:p></o:p></span></p>
- 2022-09-12 [单选] <p class="MsoNormal" style="line-height:150%">29、<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"">从一批产品中随机抽两次，每次抽</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%">1</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"">件。以</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%">A</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"">表示事件“两次都抽得正品”，</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%"> <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="mso-tab-count:1"> </span>B</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"">表示事件“至少抽得一件次品”，则下列关系式中，正确的是（</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%"><span style="color:white"> <o:p></o:p></span></span></p>
- 2022-09-12 [单选] <p class="MsoNormal" align="left" style="text-align:left;mso-pagination:widow-orphan; vertical-align:middle">28、<span lang="EN-US"> <!--[if gte vml 1]><v:shape id="图片_x0020_24" o:spid="_x0000_i1048" type="#_x0000_t75" style='width:391.8pt;height:133.8pt; mso-position-horizontal-relative:page;mso-position-vertical-relative:page'> <v:imagedata src="xxds02.files/image024.png" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="522" height="178" v:shapes="图片_x0020_24" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image024.png"> <!--[endif]--></span><span lang="EN-US" style="mso-bidi-font-size:10.5pt"> <o:p></o:p></span></p>
- 2022-09-12 [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"">设</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_i1247" type="#_x0000_t75" style='width:123pt;height:19.8pt'> <v:imagedata src="xxdsb10.files/image352.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="164" height="26" v:shapes="_x0000_i1247" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image353.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"">分别是来自正态总体</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_i1248" type="#_x0000_t75" style='width:43.2pt;height:16.8pt'> <v:imagedata src="xxdsb10.files/image354.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="58" height="22" v:shapes="_x0000_i1248" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image355.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"">和</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_i1249" type="#_x0000_t75" style='width:43.2pt;height:16.8pt'> <v:imagedata src="xxdsb10.files/image356.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="58" height="22" v:shapes="_x0000_i1249" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image357.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"">的两个样本</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"">它们相互独立，</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_i1250" type="#_x0000_t75" style='width:9pt;height:16.8pt'> <v:imagedata src="xxdsb10.files/image358.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="12" height="22" v:shapes="_x0000_i1250" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image359.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"">和</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_i1251" type="#_x0000_t75" style='width:10.8pt;height:19.8pt'> <v:imagedata src="xxdsb10.files/image360.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="14" height="26" v:shapes="_x0000_i1251" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image361.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"">是两个样本的方差，则</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_i1252" type="#_x0000_t75" style='width:26.4pt;height:19.8pt'> <v:imagedata src="xxdsb10.files/image362.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="35" height="26" v:shapes="_x0000_i1252" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image363.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"">服从的分布是（</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>
- 2022-09-12 [单选] <p class="MsoNormal">9、<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:shapetype id="_x0000_t75" coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f"> <v:stroke joinstyle="miter"></v:stroke> <v:formulas> <v:f eqn="if lineDrawn pixelLineWidth 0"></v:f> <v:f eqn="sum @0 1 0"></v:f> <v:f eqn="sum 0 0 @1"></v:f> <v:f eqn="prod @2 1 2"></v:f> <v:f eqn="prod @3 21600 pixelWidth"></v:f> <v:f eqn="prod @3 21600 pixelHeight"></v:f> <v:f eqn="sum @0 0 1"></v:f> <v:f eqn="prod @6 1 2"></v:f> <v:f eqn="prod @7 21600 pixelWidth"></v:f> <v:f eqn="sum @8 21600 0"></v:f> <v:f eqn="prod @7 21600 pixelHeight"></v:f> <v:f eqn="sum @10 21600 0"></v:f> </v:formulas> <v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect"></v:path> <o:lock v:ext="edit" aspectratio="t"></o:lock> </v:shapetype><v:shape id="_x0000_i1025" type="#_x0000_t75" style='width:108pt; height:18.6pt' o:ole=""> <v:imagedata src="xxdsb09.files/image001.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="144" height="25" v:shapes="_x0000_i1025" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image002.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1025" DrawAspect="Content" ObjectID="_1604819097"> </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">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"">的数学期望</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_i1026" type="#_x0000_t75" style='width:40.2pt;height:15.6pt' o:ole=""> <v:imagedata src="xxdsb09.files/image003.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="54" height="21" v:shapes="_x0000_i1026" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image004.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1026" DrawAspect="Content" ObjectID="_1604819098"> </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>