首页
普通专升本
成人高考
学位英语
在线刷题
最近学习
最近学习课程
最强大脑 · 3天挑战极限记...
副标题副标题副标题副
最强大脑 · 3天挑战极限记...
副标题副标题副标题副
您现在位置:
模拟考场
>
湖北自学考试
>
公共课
>
概率论与数理统计
>
浏览试题
[单选题]
设随机变量X在[-1,2]上服从均匀分布,则随机变量X的概率密度f(x)为()
A
收藏
查看答案
参考答案
试题答案:
A
答案解释:
记住即可
相关题目
有甲、乙两人,每人扔两枚均匀硬币,则两人所扔硬币均未出现正面的概率为().
假定暑假市场上对冰淇淋的需求量是随机变量X盒,它服从区间上的均匀分布,设每售出一盒冰淇淋可为小店挣得1元,但假如销售不出而屯积于冰箱,则每盒赔3元。问小店应组织()盒冰淇淋,才能使平均收益最大?
设X~N(1,),则下列选项中,不成立的是()
设A、B为两事件,P(B)>0,若P(A|B)=1,则必有()
设随机变量X服从参数为2的泊松分布,则下列结论中正确的是()
已知随机变量X服从参数为2的泊松分布,则随机变量X的方差为()
从标号为1,2,…,101的101个灯泡中任取一个,则取得标号为偶数的灯泡的概率为()
设随机事件A与B互不相容,P(A)=0.2,P(B)=0.4,则P(B|A)=()
设A与B是任意两个互不相容事件,则下列结论中正确的是()
对任意两个随机变量X和Y,由D(X+Y)=D(X)+D(Y)可以推断()
热门试题
1.
BLast fall was a first-of-its-kind season. I did not arrange (安排) any after-school classes formy children. No swimming.'No music lessons. No play dates. Nothing.Once they finished their homework, they were free to do what they pleased, but only onehour of TV. In the beginning, my sons, Ben, 11, and Nick, 9, were anxious about this sudden,unplanned freedom. I had to, push them out of the door with a ball, a bike, and so on. "Play? Iordered.I learned that this new plan takes time, patience and a lot of faith in the theory that havingexcellent grades isn't really important.When my older kids, now in college and high school, were young, I brought in the rules ofmodern parenting. They are unspoken, but followed carefully. First, you must let your childhave a variety of activities. After all, you never know where you'll find a genius (天才). Second, if the child shows the slightest talent (才能), the activity must be pushed with lessons, special coaching (辅导) and practice of several days a week. Every minute shouldbe taken and every minute has a purpose. That was really too much for my children.Now with the new plan, we told stories, We listened to music. And' the. kids played with bikes, balls, and whatever was handy. Nobody kept score. In fact, the boys played outside so much that the lawn was worn down to the soil in places. They've made friends with those who come from all over the neighbourhood to play games.We like those peaceful evenings. Ben and Nick have a good time this fall, MaYbe that's because the time offhas allowed us to enjoy each other's company;
2.
商品需要具备何种特性才能成为期货合约的上市品种()。
3.
2.安全性是管理信息具有的基本性质,其含义是
4.
应当根据土地利用总体规划划入基本农田保护区的土地包括()
5.
台同工期
热门试卷
成人高考专升本《政治》模拟试卷
去做题
已有3410做题
2020年湖北成人高考专升本政治模拟试题三
去做题
已有2205做题
成人高考专升本政治考试模拟试题及答案(1)
去做题
已有1893做题
湖北成考专升本政治真题(2021年)
去做题
已有1324做题
成人高考高起点语文考试高分突破试题及答案四
去做题
已有1189做题