【判断题】【消耗次数：1】
设X123P0.30.40.5则它必为某随机变量的分布列。
①
正确
②
错误
参考答案：
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相关题目
【简答题】
设随机变量X在区间[2，4]上服从均匀分布，则P{23}=[填空]
【简答题】
设随机变量X在区间[2，4]上服从均匀分布，则P{23}=[填空]
【多选题】
设随机变量X的分布函数是F(x)，则下列为F(x)性质的是
①
<img class=jc-formula data-tex=0\le F(x)\le 1 src=https://huaweicloudobs.ahjxjy.cn/82E25FE8FF5C1C1C1BE69C5B62FC9C31.png style=vertical-align: middle;/>
②
F(x)单调递减
③
F(x)右连续
④
<img class=jc-formula data-tex=F(-\infty )=0,F(+\infty )=1 src=https://huaweicloudobs.ahjxjy.cn/ABE8CCD098CA6191DA91CCD28F5F36DA.png style=vertical-align: middle;/>
随机题目
【单选题】
If you take quality into consideration, you will find our price______.
①
changeable
②
readable
③
comfortable
④
reasonable
【单选题】
Thank you for your time. I’m looking forward to ______.
①
you reply
②
your reply
③
you answer
④
you to answer
【单选题】
The manager______ at 8:30 AM for the meeting, but he didnt show up.
①
ought to arrive
②
should have arrived
③
should arrive
④
was supposed to arrived
【单选题】
I intend to ______ a larger order if you give me a discount.
①
place
②
play
③
pose
④
pick
【单选题】
When you are______, sit at the front edge of the chair, leaning forward slightly.
①
seated
②
fixed
③
rested
④
decided
【单选题】
_____withthesizeofthewholeearth,thehighestmountaindoesnotseemhighatall.
①
When compared
②
Compare
③
While comparing
④
Comparing
【单选题】
____________the rainny weather, they would be all right.
①
Were it not for
②
It were not for
③
Not for it
④
For it were not
【单选题】
The woman was innocent and the judge insisted that she______at once.
①
be set free
②
be setting free;
③
was set free
④
set free