【单选题】【消耗次数：1】
<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">
参考答案：
复制
纠错
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【单选题】
设随机变量<imgwidth="19"height="17"v:shapes="_x0000_i1256"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image266.png">的均值<imgwidth="68"height="21"v:shapes="_x0000_i1257"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image360.png">，方差<imgwidth="75"height="25"v:shapes="_x0000_i1258"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image362.png">，则<imgwidth="60"height="25"v:shapes="_x0000_i1259"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image364.png">（）
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【单选题】
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【单选题】
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②
3
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18
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36
【单选题】
设随机变量X和Y相互独立，且都服从<imgwidth="61"height="25"v:shapes="_x0000_i1053"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image050.png">，若<imgwidth="172"height="21"v:shapes="_x0000_i1054"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image052.png">，其中<imgwidth="27"height="21"v:shapes="_x0000_i1055"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image054.png">为常数，则<imgwidth="28"height="25"v:shapes="_x0000_i1056"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image056.png">=（）
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②
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③
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【单选题】
设随机变量X的期望<imgwidth="41"height="21"v:shapes="_x0000_i1042"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image028.png">和方差<imgwidth="42"height="21"v:shapes="_x0000_i1043"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image030.png">都存在，则对任意正数<imgwidth="13"height="15"v:shapes="_x0000_i1044"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image032.png">，有（）
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②
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③
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④
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【单选题】
设随机变量<imgwidth="19"height="17"v:shapes="_x0000_i1111"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image123.png">的数学期望<imgwidth="68"height="21"v:shapes="_x0000_i1112"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image145.png">，方差<imgwidth="75"height="25"v:shapes="_x0000_i1113"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image147.png">，则由切比雪夫不等式有<imgwidth="118"height="21"v:shapes="_x0000_i1114"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image149.png">（）
①
<imgwidth="16"height="41"v:shapes="_x0000_i1115"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image151.png">
②
<imgwidth="16"height="41"v:shapes="_x0000_i1116"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image153.png">
③
<imgwidth="16"height="41"v:shapes="_x0000_i1117"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image130.png">
④
<imgwidth="15"height="41"v:shapes="_x0000_i1118"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image132.png">
【单选题】
设连续型随机变量<imgwidth="19"height="17"v:shapes="_x0000_i1182"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image266.png">的密度函数为<imgwidth="36"height="21"v:shapes="_x0000_i1183"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image268.png">，则当（）时，<imgwidth="80"height="35"v:shapes="_x0000_i1184"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image270.png">为随机变量<imgwidth="19"height="17"v:shapes="_x0000_i1185"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image266.png">数学期望.
①
<imgwidth="80"height="35"v:shapes="_x0000_i1186"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image270.png">收敛
②
<imgwidth="36"height="21"v:shapes="_x0000_i1187"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image268.png">为有界函数
③
<imgwidth="88"height="29"v:shapes="_x0000_i1188"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image274.png">
④
<imgwidth="80"height="35"v:shapes="_x0000_i1189"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image270.png">绝对收敛
【单选题】
设<imgwidth="35"height="21"v:shapes="_x0000_i1104"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image133.png">是相互独立且均服从正态分布<imgwidth="54"height="41"v:shapes="_x0000_i1105"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image135.png">的随机变量，则<imgwidth="88"height="21"v:shapes="_x0000_i1106"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image137.png">（）
①
<imgwidth="29"height="44"v:shapes="_x0000_i1107"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image139.png">
②
<imgwidth="29"height="44"v:shapes="_x0000_i1108"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image139.png">
③
<imgwidth="28"height="46"v:shapes="_x0000_i1109"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image141.png">
④
<imgwidth="29"height="46"v:shapes="_x0000_i1110"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image143.png">
随机题目
【单选题】
下列哪项是房颤患者选用起搏器治疗的指征？（）
①
房颤患者出现2.5S的长间歇
②
药物治疗有效，但出现明显心动过缓
③
房颤药物治疗无效
④
动态心电图出现夜间3S的长间歇
⑤
AF最慢心率39次/分
【单选题】
心内膜射频消融的适应症不包括哪项？（）
①
心力衰竭的发生与心房颤动无关
②
抗心律失常药物无效或无法耐受
③
心房直径小于等于50mm
④
有与房颤有关的卒中
⑤
患者有明确意愿