西南大学18秋[0264]概率论作业
02641、已知二维随机变量<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a6d387c_OUL"/>的联合分布律为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a6e4d9a_OUL"/>则().
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<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a748380_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a74de31_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a75430b_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a759dac_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
参考答案：<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a759dac_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>；
2、设两个相互独立的随机变量<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a668fb3_OUL"/>，<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a66dcc5_OUL"/>，<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a670349_OUL"/>，<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a6737b5_OUL"/>,则（）。
A.<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSo5d2ccd3b_14462283059_OUL"/>
B.<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSo5d2ccd3b_1446228a98e_OUL"/>
C.<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSo5d2ccd3b_1446228f15d_OUL"/>
D.<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSo5d2ccd3b_1446229e704_OUL"/>
参考答案：D.<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSo5d2ccd3b_1446229e704_OUL"/>；
3、设随机变量X~<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a615b7f_OUL"/>,且EX=3,<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a61c96c_OUL"/>,则P(-1<X<1)=().
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a640545_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a6458bd_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a64af3b_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a6508e0_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
参考答案：<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a6458bd_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>；
4、设随机变量X的概率密度为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a5d0403_OUL"/>且<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a5d482d_OUL"/>，则（）.
k=2,b=1
k=1,b=2
k=1,b=1
k=2,b=2
5、<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a58fd7c_OUL"/>，则<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a59601e_OUL"/>。
11/12
7/12
1/2
5/6
6、设随机变量X服从二项分布<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a008eec_OUL"/>,由切比雪夫不等式有().
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a0291f9_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a02fbc6_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a035fda_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_1440a03b962_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
7、对于任意两个随机变量<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_14409fb1705_OUL"/>，下面（）说法与协方差<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_14409fb6954_OUL"/>不等价。
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_14409fd97c6_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_14409fdfa03_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_14409fe5f48_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_14409fec03c_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
8、设<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_14409f5c500_OUL"/>，则必有（）。
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_14409f7eca7_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_14409f84a46_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_14409f8b17b_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_14409f913a6_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
9、两人相约7点到8点在某地会面，先到者等候另一人20分钟既可离去，则这两个人能会面的概率为（）.
0
4/9
5/9
1
10、设随机变量X的分布列为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_14409eb10a1_OUL"/>则常数C＝().
1
2
4
5
11、设随机变量X~B(n,p),且E(X+1)=6,D(X+1)=4,则n=().
10
20
25
50
12、下面是几个随机变量的概率分布，其中期望不存在的为（）。
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_14409dc6523_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_14409dce3cc_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_14409dd4510_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_14409dda117_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>
13、设随机变量<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_14409d62973_OUL"/>的分布函数为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_14409d65d24_OUL"/>则其中常数为（）。
A=1,B=-1
A=-1,B=1
A=1,B=1
A=-1,B=-1
14、对事件A、B，下列说法正确的是（）.
若A与B互不相容，则<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_14409d338cf_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>也互不相容
若A与B相容，则<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_14409d3fc51_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>也相容
若A与B互不相容，则A与B相互独立
A与B相互独立，则<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSe5d2ccd3b_14409d50d2b_USL&rc=QyEFx8H7XhzPN%2FHl0%2B5m%2FA%3D%3D"/>也相互独立
15、设随机变量X服从两点分布<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143faa56887_OUL"/>，其分布律为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143faa59e0e_OUL"/>其中<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143faa644b2_OUL"/>,则X的特征函数为（）.
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143faa94e36_USL&rc=QyEFx8H7XhxDxatDFYxEfA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143faa9b273_USL&rc=QyEFx8H7XhxDxatDFYxEfA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143faaa1280_USL&rc=QyEFx8H7XhxDxatDFYxEfA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143faaa781b_USL&rc=QyEFx8H7XhxDxatDFYxEfA%3D%3D"/>
16、设随机变量<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fa9e43d8_OUL"/>服从参数为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fa9d9d95_OUL"/>的泊松分布，则<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fa9e82b2_OUL"/>=（）。
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143faa1b0bd_USL&rc=QyEFx8H7XhxDxatDFYxEfA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143faa21926_USL&rc=QyEFx8H7XhxDxatDFYxEfA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143faa28570_USL&rc=QyEFx8H7XhxDxatDFYxEfA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143faa2eb8b_USL&rc=QyEFx8H7XhxDxatDFYxEfA%3D%3D"/>
17、设随机变量X的概率密度函数为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fa933abd_OUL"/>则随机变量<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fa93676d_OUL"/>的概率密度为（）.
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fa9899b5_USL&rc=QyEFx8H7XhxDxatDFYxEfA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fa99a7ac_USL&rc=QyEFx8H7XhxDxatDFYxEfA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fa9a8910_USL&rc=QyEFx8H7XhxDxatDFYxEfA%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fa9b6ccd_USL&rc=QyEFx8H7XhxDxatDFYxEfA%3D%3D"/>
18、设X、Y为相互独立的随机变量，且<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSz5d2ccd3b_143f69aa23e_OUL"/>,<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSz5d2ccd3b_143f69aebad_OUL"/>,则E(X-Y),D(X-Y)分别为（）.
-1；7
-1；25
1；7
1；25
19、设<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoA55d2ccd3b_143d1d64a0e_OUL"/>服从二维正态分布<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoA55d2ccd3b_143d1d6c5b0_OUL"/>，<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoA55d2ccd3b_143d1d7221b_OUL"/>是<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoA55d2ccd3b_143d1d752fa_OUL"/>独立的（）.
充分但不必要条件
必要但不充分条件.
无关条件
充分且必要条件
20、下列函数可以作为某个随机变量X的概率密度函数的是（）.
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoA55d2ccd3b_143d1d1b4d5_USL&rc=QyEFx8H7XhxfL6DJhqsA8g%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoA55d2ccd3b_143d1d22c0e_USL&rc=QyEFx8H7XhxfL6DJhqsA8g%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoA55d2ccd3b_143d1d29cad_USL&rc=QyEFx8H7XhxfL6DJhqsA8g%3D%3D"/>
<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoA55d2ccd3b_143d1d332f5_USL&rc=QyEFx8H7XhxfL6DJhqsA8g%3D%3D"/>
21、箱中有10个产品，其中2个次品，现从中任取3个产品，用A表示“取到的3个中恰有一个次品”，B表示“取到的3个中没有次品”，C表示“取到的3个都是次品”，D表示“取到的3个中次品数小于3”，则上述四个事件中为基本事件的是（）.
A
B
C
D
22、X、Y相互独立，则X、Y必不相关.
A.√
B.×
23、设一口袋中有a只白球,b只黑球,从中取出三只球(不放回),则三只球依次为黑白黑的概率为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSc5d2ccd3b_14414a5c20b_OUL"/>.
A.√
B.×
24、若X～B(3,0.2),Y～B(5,0.2),且X与Y相互独立，则X+Y～B(8,0.2).
A.√
B.×
25、每一个连续型随机变量均有方差存在。
A.√
B.×
26、设<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSc5d2ccd3b_1441473980c_OUL"/>服从<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSc5d2ccd3b_14414749791_OUL"/>的均匀分布，<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSc5d2ccd3b_1441474de83_OUL"/>，则<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSo5d2ccd3b_14462ee1c16_OUL"/>的密度函数为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSc5d2ccd3b_144147515a1_OUL"/>。
A.√
B.×
27、随机向量（X,Y）服从二元正态分布，则X的边际分布为正态分布，Y的边际分布也为正态分布.
A.√
B.×
28、设X服从参数为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSc5d2ccd3b_14414708bb9_OUL"/>的泊松分布，则<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSc5d2ccd3b_1441470c9da_OUL"/>。
A.√
B.×
29、已知随机变量<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSx5d2ccd3b_1440687c654_OUL"/>的联合分布、边际分布如下表<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSk5d2ccd3b_1445c564bd8_OUL"/> 则<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSx5d2ccd3b_14406888aea_OUL"/>相互独立。
A.√
B.×
30、设两个相互独立的随机变量<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSx5d2ccd3b_14406857869_OUL"/>，<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSx5d2ccd3b_14406859c71_OUL"/>的方差分别是4和2，则<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSx5d2ccd3b_1440685d7e5_OUL"/>＝44。
A.√
B.×
31、任意随机变量均存在数学期望。
A.√
B.×
32、设<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSx5d2ccd3b_144067f35b2_OUL"/>为两两不相关的随机变量序列，<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSx5d2ccd3b_144067f6d48_OUL"/>，且存在常数C，使得<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSx5d2ccd3b_144067fc05e_OUL"/>则<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSx5d2ccd3b_144067ff5ec_OUL"/>服从大数定律。
A.√
B.×
33、特征函数<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSx5d2ccd3b_144067d8ec5_OUL"/>具有性质：<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSx5d2ccd3b_144067dc0b1_OUL"/>。
A.√
B.×
34、设X、Y是随机变量，若E(XY)=EX?EY,则X与Y相互独立.
A.√
B.×
35、X为随机变量，a,b是不为零的常数，则D(aX+b)=aDX+b.
A.√
B.×
36、设<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fab96545_OUL"/>为相互独立的随机变量序列，如果数学期望<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fab9a0d2_OUL"/>均为有限的，则序列<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fab9d8cb_OUL"/>服从大数定律.
A.√
B.×
37、设<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fab6c6b9_OUL"/>，则<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fab7125c_OUL"/>与<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fab73677_OUL"/>是相互独立的充分必要条件为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fab77961_OUL"/>。
A.√
B.×
38、X为随机变量，a,b是不为零的常数，则E(aX+b)=aEX+b.
A.√
B.×
39、设A、B为二事件，则A—B=A—AB.
A.√
B.×
40、n个相互独立的随机变量之积的特征函数等于它们特征函数的乘积。
A.√
B.×
41、设A、B、C为三事件，若满足：P(AB)=P(A)P(B),P(AC)=P(A)P(C),P(BC)=P(B)P(C),则事件A、B、C必然相互独立.
A.√
B.×
42、设<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSx5d2ccd3b_144067006b7_OUL"/>在（0，5）服从均匀分布，则<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSx5d2ccd3b_1440670453f_OUL"/>的方程<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSx5d2ccd3b_1440670abac_OUL"/>有实根的概率为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSk5d2ccd3b_1445c75a523_OUL"/>。
43、设X与Y为相互独立的随机变量,<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSs5d2ccd3b_14400e29e25_OUL"/>,Y的密度函数为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSs5d2ccd3b_14400e31284_OUL"/>,则E(X+Y)=<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSk5d2ccd3b_1445c74e6c6_OUL"/>。
44、设X的概率密度为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSs5d2ccd3b_14400ded80f_OUL"/>，则<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSs5d2ccd3b_14400df1ea5_OUL"/>___________.
45、设X与Y为相互独立的随机变量,<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fa7535dc_OUL"/>,Y的密度函数为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fa75c0ab_OUL"/>,则D(X-Y)=<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSk5d2ccd3b_1445c6a74cd_OUL"/>。
46、若A、B为二事件，<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fa711f2f_OUL"/>，则<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fa717e7d_OUL"/><imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSk5d2ccd3b_1445c695216_OUL"/>。<u></u>
47、设<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSz5d2ccd3b_143f7194de3_OUL"/>的概率密度为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSz5d2ccd3b_143f719827a_OUL"/>，则<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSz5d2ccd3b_143f71a24bc_OUL"/>=<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSk5d2ccd3b_1445c6614e8_OUL"/>。
48、设随机变量X服从几何分布<imgtitle="201609131473752968344069321.png"alt="image.png"src="http://zuoye.eduwest.com/resourcefile/uploadFiles/file/questionImgs/201609131473752968344069321.png"/>。求X的特征函数<imgtitle="201609131473752980475088314.png"alt="image.png"src="http://zuoye.eduwest.com/resourcefile/uploadFiles/file/questionImgs/201609131473752980475088314.png"/>。
49、设随机事件A的概率为P(A)=0.5,随机事件B的概率为P(B)=0.4，条件概率：由乘法公式<imgtitle="201609131473752407527058258.png"alt="image.png"src="http://zuoye.eduwest.com/resourcefile/uploadFiles/file/questionImgs/201609131473752407527058258.png"/><imgtitle="201609131473752421449010759.png"alt="image.png"src="http://zuoye.eduwest.com/resourcefile/uploadFiles/file/questionImgs/201609131473752421449010759.png"/>
50、<imgsrc="/resourcefile/uploadFiles/file/questionImgs/201809041536049239251017306.png"title="201809041536049239251017306.png"alt="201812B1.png"/>
51、设随机变量<imgtitle="201609131473754304675049025.png"alt="image.png"src="http://zuoye.eduwest.com/resourcefile/uploadFiles/file/questionImgs/201609131473754304675049025.png"/>的概率密度函数为求随机变量<imgtitle="201609131473751113533060022.png"alt="image.png"src="http://zuoye.eduwest.com/resourcefile/uploadFiles/file/questionImgs/201609131473751113533060022.png"/>的概率密度。
52、设<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fac9048f_OUL"/>的联合密度函数为<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fac95fbe_OUL"/>求（1）<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fac9bc64_OUL"/>的边际密度函数<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fac9f738_OUL"/>，<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143faca2103_OUL"/>的边际密度函数<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143faca47c4_OUL"/>，并说明<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143faca7dc0_OUL"/>与<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143faca9c1b_OUL"/>是否独立？（2）条件密度函数<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143facae3e7_OUL"/>.
53、<imgsrc="/resourcefile/uploadFiles/file/questionImgs/201809041536049206496030794.png"title="201809041536049206496030794.png"alt="201812A3.png"/>
54、<imgsrc="/resourcefile/uploadFiles/file/questionImgs/201809041536049152739078625.png"title="201809041536049152739078625.png"alt="201812A1.png"/>
55、设<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSc5d2ccd3b_144159854d0_OUL"/>是独立随机变量序列,且<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSc5d2ccd3b_14415988c1f_OUL"/>,证明：<imgwidth="29"height="24"src="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSc5d2ccd3b_1441598fd2b_OUL"/>服从大数定律.
56、设A、B为两个随机事件，且<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fb0c28c9_OUL"/>，证明：若<imgsrc="http://fs.eduwest.com/filesys/image.jsp?fc=00quoSw5d2ccd3b_143fb0c6656_OUL"/>，则A与B相互独立。
57、发报台分别以0.7和0.3的概率发出信号0和1，由于通信系统受到干扰，当发出信号0时，收报台分别以0.8和0.2的概率收到信号0和1；又当发出信号1时，收报台分别以0.9及0.1的概率收到信号1和0。现收报台收到信号0，求原发信号也是0的概率.
58、炮战中，在距目标250米，200米，150米处射击的概率分别为0.1、0.7、0.2,而在各处射击时命中目标的概率分别为0.05、0.1、0.2,（1）求目标被击毁的概率；（2）现在已知目标被击毁，求击毁目标的炮弹是由距目标250米处射出的概率。
59、设<imgwidth="28"height="21"src="data:image/png;base64,R0lGODlhHAAVAHcAMSH+GlNvZnR3YXJlOiBNaWNyb3NvZnQgT2ZmaWNlACH5BAEAAAAALAIAAwAYAA4AhAAAAAAAAAMGCw0KCAgIDQsGAwAAAwgKDQQGCAQAAA0IBAMDCAoLDQoEAAAECgMAAAQIDQAEBA0LCgsLDQsKCwQECgMAAwADCAAABA0ICAQAAw0LCwgDAAoEBAgGCwECAwV1ICACjTCeaDoOBFAYhyqvSALPuLIweBM4pMBNNHgEAqaUAtKIJCCSRHKwmOAo0QpvYIkpLlYcQIHhjcGSinjUAIpKgExsHYWIJBpvUkw2F8AAGxxHR4BFZW9ugnsoHWZxcydckScSHncJbih/YSIKR4hibSMhADs="/>在平面上以原点为心1为半径的圆内服从均匀分布，（1）求<imgwidth="28"height="21"src="data:image/png;base64,R0lGODlhHAAVAHcAMSH+GlNvZnR3YXJlOiBNaWNyb3NvZnQgT2ZmaWNlACH5BAEAAAAALAIAAwAYAA4AhAAAAAAAAAMGCw0KCAgIDQsGAwAAAwgKDQQGCAQAAA0IBAMDCAoLDQoEAAAECgMAAAQIDQAEBA0LCgsLDQsKCwQECgMAAwADCAAABA0ICAQAAw0LCwgDAAoEBAgGCwECAwV1ICACjTCeaDoOBFAYhyqvSALPuLIweBM4pMBNNHgEAqaUAtKIJCCSRHKwmOAo0QpvYIkpLlYcQIHhjcGSinjUAIpKgExsHYWIJBpvUkw2F8AAGxxHR4BFZW9ugnsoHWZxcydckScSHncJbih/YSIKR4hibSMhADs="/>的联合密度函数<imgwidth="49"height="21"src="data:image/png;base64,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"/>；（2）<imgwidth="28"height="21"src="data:image/png;base64,R0lGODlhHAAVAHcAMSH+GlNvZnR3YXJlOiBNaWNyb3NvZnQgT2ZmaWNlACH5BAEAAAAALAIAAwAYAA4AhAAAAAAAAAMGCw0KCAgIDQsGAwAAAwgKDQQGCAQAAA0IBAMDCAoLDQoEAAAECgMAAAQIDQAEBA0LCgsLDQsKCwQECgMAAwADCAAABA0ICAQAAw0LCwgDAAoEBAgGCwECAwV1ICACjTCeaDoOBFAYhyqvSALPuLIweBM4pMBNNHgEAqaUAtKIJCCSRHKwmOAo0QpvYIkpLlYcQIHhjcGSinjUAIpKgExsHYWIJBpvUkw2F8AAGxxHR4BFZW9ugnsoHWZxcydckScSHncJbih/YSIKR4hibSMhADs="/>是否相互独立？为什么？(3)求<imgwidth="28"height="21"src="data:image/png;base64,R0lGODlhHAAVAHcAMSH+GlNvZnR3YXJlOiBNaWNyb3NvZnQgT2ZmaWNlACH5BAEAAAAALAIAAwAYAA4AhAAAAAAAAAMGCw0KCAgIDQsGAwAAAwgKDQQGCAQAAA0IBAMDCAoLDQoEAAAECgMAAAQIDQAEBA0LCgsLDQsKCwQECgMAAwADCAAABA0ICAQAAw0LCwgDAAoEBAgGCwECAwV1ICACjTCeaDoOBFAYhyqvSALPuLIweBM4pMBNNHgEAqaUAtKIJCCSRHKwmOAo0QpvYIkpLlYcQIHhjcGSinjUAIpKgExsHYWIJBpvUkw2F8AAGxxHR4BFZW9ugnsoHWZxcydckScSHncJbih/YSIKR4hibSMhADs="/>的协方差解：（1）联合密度函数为<imgwidth="185"height="64"src="data:image/png;base64,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"/>（2）求得<imgwidth="28"height="21"src="data:image/png;base64,R0lGODlhHAAVAHcAMSH+GlNvZnR3YXJlOiBNaWNyb3NvZnQgT2ZmaWNlACH5BAEAAAAALAIAAwAYAA4AhAAAAAAAAAMGCw0KCAgIDQsGAwAAAwgKDQQGCAQAAA0IBAMDCAoLDQoEAAAECgMAAAQIDQAEBA0LCgsLDQsKCwQECgMAAwADCAAABA0ICAQAAw0LCwgDAAoEBAgGCwECAwV1ICACjTCeaDoOBFAYhyqvSALPuLIweBM4pMBNNHgEAqaUAtKIJCCSRHKwmOAo0QpvYIkpLlYcQIHhjcGSinjUAIpKgExsHYWIJBpvUkw2F8AAGxxHR4BFZW9ugnsoHWZxcydckScSHncJbih/YSIKR4hibSMhADs="/>的边缘密度函数为<imgwidth="147"height="35"src="data:image/png;base64,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"/><imgwidth="181"height="64"src="data:image/png;base64,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"/>，同理<imgwidth="253"height="64"src="data:image/png;base64,R0lGODlh/QBAAHcAMSH+GlNvZnR3YXJlOiBNaWNyb3NvZnQgT2ZmaWNlACH5BAEAAAAALAIABAD4ADgAhQAAAAAAAAAAAwgKDQ0LCgQAAAQIDQsGAwoEAwoEAAoEBAoLDQ0LCwgDBA0ICAgDAAAECgYAAwYLDQ0KCAMDCAsLDQMGCwADCA0IBAgIDQsGCAQABAAABAoGCAgECAMAAwgGCwQECgMAAAQGCwMECgMGCAQDCAYAAAYKDQoICggDAwsLCwQAAwMABAMDAAADBAoKDQ0KCgsGBAsIBAQEBAQDAwsLCgsKCAQGCAoLCwQICgECAwECAwECAwECAwECAwb/QIBwSCwaj8ikcslUJgSDpnRKrVqv2Kx2y80SCoaueEwum8/o6iGcbrvf8DgaES1+AwG2fM/v+8kKC0UMDYIHeX+JiouMRIFFDnUMDxCNlpeYaI9JCZVSeKChoqOkpaGZqKlWm0eTekwBqrKzigwREkkTFBVTsbS/wG+2uEh0VL7Bycpiw0hrx2h3FnyTF7x91dfLW81GGNMAExlNyGUaCwQbgnF31nAHngDt2ttZ3UQYoRzrS+VnxnsOuGtzKN4QgfTqXbkn5FAog0p8ZSvTIeEbhEsOgLOSIMDGIhgV2rslJtY8MhhexQl55NBHIR3dYRgoZBKiJCxFWmGoBVnO/y0YIK6kSaTjS3z7ADDwQC/fTWdEdVIhxG+Lz6hZHD7l0nEUxJ8dVRqZ8CEKARBIjEK16CVEkoqWqHYp95NJTF4z2QYkOkHE1iNfwpxT4tJIXSxykejSS63QXCKHl2BIupTxULZqkQSeMKIJPJBYsQDMRaJRYquQaXYVJZSsWbSLEoRu6LHVgxImLDtx1xcKlgmlmYxOxOAEiiGmQBHBszy1bsBgAAxOdCeAb5xHJyU1TCpedSh9AwiVotHzUWzGrcQqR3e2ks2dpaYo822hijpLFi8qfhwLsnKyPWfEJLgJmIouKzwglhauXUEAC/gp0WAt6fmHnBDfRdiEdlUt0/+bhls8CKIUE7TQoWbR1eKYhUL4k8V8UsERngEdbXfEZPzcBUBeGKaYCHCouVgFggrGyA4LLhgwyXlC4IiUIJX1qMdqD2FBJSgQ8dgTAEJS8aGRcWDwAgxKPcDkjjaGU5Y8sMnjIzWUlNQlmKokwMaER5RYVWDS8cNnIp/Z5lUSc9KZSTrrdPIehETARwSeV+IxXhORiudNdvcFwsB9hhqpXwJpDljkEATm9uguXoqwT1+rqnrihisOEQMMBLilX6dSaTUpSB9xWER9qYIngrDXrfKqDFHYiatUm4440wxbAUkEjEUMl4i18uSG6LI63dooDTWQYC2yRIpVqyXYPhP/FLdeFHCTTeexCuUDf1XRFVYYjGCDqUQsdcOwI7KyiLU8JmDBuexW4StMxeITAA4iVHJAqGNQBWwR0h6hrGkVCjHhIRQnjGJyoHwEag70GjDxq2Rgq8xpIjPzgI1PgPgFBNmsvOQZUYoEc8xcLAxAzdxZkLM+LAOtxM9K20OvKA276ZFNWN7ctMKxXu00zVEnAHEoKu9jtdZS8JeGQwsqRHUoDQfVl9EPWLPy2GQzYfYZOP4Zo9BEYywC3HK3umvd/XZMhitNuvfyzDlCkc92b+e8Tz5nEk6q4WNMiGc9TgVQgrugCOACHjqkGHncFWgVsuWF90ffdnpLlY8nk4x3dbrc14nIOhJ3v75O7CLN3qi7Kt2eUF9ps947SpCLkHwyHQk1Sdu1Rd8vvYMTvnzma6o5YjJ3pI28w+B0Hvr3u28vMxuR7e5+K5iPkRfw79cPv+tmoG3//kq4zP//b/AfAAeIt8oR8IBdaBYCF8izB0SNgX4IAgA7"/>故<imgwidth="143"height="25"src="data:image/png;base64,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"/>故<imgwidth="28"height="21"src="data:image/png;base64,R0lGODlhHAAVAHcAMSH+GlNvZnR3YXJlOiBNaWNyb3NvZnQgT2ZmaWNlACH5BAEAAAAALAIAAwAYAA4AhAAAAAAAAAMGCw0KCAgIDQsGAwAAAwgKDQQGCAQAAA0IBAMDCAoLDQoEAAAECgMAAAQIDQAEBA0LCgsLDQsKCwQECgMAAwADCAAABA0ICAQAAw0LCwgDAAoEBAgGCwECAwV1ICACjTCeaDoOBFAYhyqvSALPuLIweBM4pMBNNHgEAqaUAtKIJCCSRHKwmOAo0QpvYIkpLlYcQIHhjcGSinjUAIpKgExsHYWIJBpvUkw2F8AAGxxHR4BFZW9ugnsoHWZxcydckScSHncJbih/YSIKR4hibSMhADs="/>不相互独立。（3）可求得<imgwidth="79"height="21"src="data:image/png;base64,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"/>，<imgwidth="87"height="21"src="data:image/png;base64,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"/>，故<imgwidth="116"height="21"src="data:image/png;base64,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"/>.
60、<imgsrc="/resourcefile/uploadFiles/file/questionImgs/201809041536049299458033341.png"title="201809041536049299458033341.png"alt="201812B3.png"/>
农业资源利用题库
页:
[1]