智慧树知到《概率论与数理统计》见面课答案

智慧树知到《概率论与数理统计》见面课答案智慧树知到《概率论与数理统计》见面课答案见面课：一起见识一下随机变量及分布1、问题:请问任一随机变量一定有（）。选项：A：分布律B：概率密度C：分布函数答案:【分布函数】2、问题:在此次见面课中，讲到两个相邻微信之间的时间间隔T服从下面哪个分布？选项：A:泊松分布B:正态分布C:二项分布D:指数分布答案：【指数分布】3、问题:请问在这次见面课中，涉及到下面哪些分布？选项：A:多项式分布B:泊松分布C:正态分布D:幂律分布答案:【多项式分布;泊松分布;正态分布;幂律分布】4、问题:泊松分布仅能描述稀有事件（小概率事件）发生的次数这类问题。选项：A:对B：错答案: 【错】5、问题:相互独立的指数分布的最小值函数仍是指数分布。选项：A:对B：错答案：【对】见面课：参数估计与假设检验的那些事1、问题:经验分布函数是（）的近似。选项：A：密度函数B：分布函数答案:【分布函数】2、问题：直方图是（）的近似。选项：A：密度函数B：分布函数智慧树知到《概率论与数理统计》见面课答案智慧树知到《概率论与数理统计》见面课答案66、问题:假设检验中的显著性水平a表示（）。答案:【密度函数】3、问题:最大次序统计量的退化的极限分布是（）。选项：A：广义极值分布B:正态分布C：两点分布D:t分布答案:【正态分布】）。4、问题:假设随机变量X服从参数为人的泊松分布，则人的矩估计（）。选项：A:唯一B:不唯一C:无法确定答案:【不唯一】5、问题:以下几个统计量中哪个表示的不是平均（）。选项：A:平均数B:众数C:中位数D:方差答案:【方差】智慧树知到《概率论与数理统计》见面课答案智慧树知到《概率论与数理统计》见面课答案选项：A：犯第一类错误的概率B：犯第二类错误的概率答案:【犯第一类错误的概率】见面课：我们聊聊随机事件和概率1、问题:设A,B为随机事件，且<imgsrc="/article/UploadPic/2020-5/2020510134959566.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">,P(B)>04h)成立。选项：A:P(A)<P(A|B)B:P(A)WP(A|B)C:P(A)>P(A|B)D:P(A)三P(A|B)答案:【P(A)WP(A|B)】2、问题:设P(A)=0.5,P(B|A)=0.4,P(A|B)=0.5,则P(A|<imgsrc="/article/UploadPic/2020-5/2020510134959890.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">)=()。选项：A:0.3B:5/7C:0.2D:2/3答案: 【5/7】3、问题:<imgsrc="/article/UploadPic/2020-5/2020510134959184.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">选项：A:<imgsrc="/article/UploadPic/2020-5/2020510134959764.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">B:<imgsrc="/article/UploadPic/2020-5/202051013500556.png"alt=””border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">C:<imgsrc="/article/UploadPic/2020-5/202051013500733.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">D:<imgsrc="/article/UploadPic/2020-5/202051013500242.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">答案: 【<imgsrc="/article/UploadPic/2020-5/202051013500556.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">智慧树知到《概率论与数理统计》见面课答案智慧树知到《概率论与数理统计》见面课答案33、问题:若随机变量X,Y独立，则智慧树知到《概率论与数理统计》见面课答案智慧树知到《概率论与数理统计》见面课答案11、问题:设随机变量X,Y的方差存在且不等于0，若有】4、问题:<imgsrc="/article/UploadPic/2020-5/202051013500645.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">选项：A：单调增大B：单调递减C：保持不变D：增减不定答案:【保持不变】5、问题:设A,B为两个事件，若A与B独立，则A与B互不相容。选项：A:对B:错答案：【错】6、问题:连续型随机变量的密度函数是唯一确定的。选项：A:对B:错答案:【错】见面课：话一话随机变量的数字特征和极限定理<imgsrc="/article/UploadPic/2020-5/202051013500520.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">，则X,Y不相关。选项：A:对B：错答案: 【对】2、问题:若随机变量<imgsrc="/article/UploadPic/2020-5/202051013500963.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">,且<imgsrc="/article/UploadPic/2020-5/202051013500122.png“alt=””border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">则二维随机变量<imgsrc="/article/UploadPic/2020-5/202051013500949.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">服从二维正态分布。选项：A:对B：错答案: 【错】智慧树知到《概率论与数理统计》见面课答案智慧树知到《概率论与数理统计》见面课答案智慧树知到《概率论与数理统计》见面课答案智慧树知到《概率论与数理统计》见面课答案55、问题:若随机变量X,Y满足<imgsrc="/article/UploadPic/2020-5/202051013500744.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">。选项：A:对B：错答案: 【对】4、问题:若<imgsrc="/article/UploadPic/2020-5/202051013500399.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">,与X独立同分布，则当<img src="/article/UploadPic/2020-5/202051013500897.png" alt=””border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">时，<imgsrc="/article/UploadPic/2020-5/202051013500530.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">依概率收敛于2。选项：A:对B：错答案: 【错】<imgsrc="/article/UploadPic/2020-5/202051013500378.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">，则<imgsrc="/article/UploadPic/2020-5/202051013500848.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">。选项：A:对B：错答案: 【错】6、问题:将一枚硬币重复掷n次，以X和Y分别表示正面向上和反面向上的次数，则X和Y的相关系数等于()。选项：A:-1B:0C:1D:无法确定答案: 【-1】7、问题:已知随机变量<imgsrc="/article/UploadPic/2020-5/202051013501337.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">且<imgsrc="/article/UploadPic/2020-5/202051013501632.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">，则参数<imgsrc="/article/UploadPic/2020-5/202051013501348.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">值是()。选项：A:<imgsrc="/article/UploadPic/2020-5/202051013501423.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);"><imgsrc="/article/UploadPic/2020-5/202051013501269.png“ alt=””border="0"onload="returnimgzoom(this,600);“style="cursor:pointer;"onclick="javascript:window.open(this.src);"><imgsrc="/article/UploadPic/2020-5/202051013501382.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);"><imgsrc="/article/UploadPic/2020-5/202051013501868.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">答案: 【<imgsrc="/article/UploadPic/2020-5/202051013501269.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">】8、问题:已知随机变量<imgsrc="/article/UploadPic/2020-5/202051013501985.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">的方差存在，且满足不等式<imgsrc="/article/UploadPic/2020-5/202051013501703.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">则一定有()。选项：A:<imgsrc="/article/UploadPic/2020-5/202051013501406.png"alt=""border="0"onload="returnimgzoom(this,600);“style="cursor:pointer;"onclick="javascript:window.open(this.src);”><imgsrc="/article/UploadPic/2020-5/202051013502164.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);"><imgsrc="/article/UploadPic/2020-5/202051013502489.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">答案: 【<imgsrc="/article/UploadPic/2020-5/202051013502489.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">】9、问题:随机变量<imgsrc="/article/UploadPic/2020-5/202051013502128.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">独立同分布且服从相同参数人的泊松分布，则下面随机变量序列中不满足切比雪夫大数定律条件的是()。选项：A:<imgsrc="/article/UploadPic/2020-5/202051013502469.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);"><img src="/article/UploadPic/2020-5/202051013502105.png" alt=””border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);"><imgsrc="/article/UploadPic/2020-5/202051013502813.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);"><imgsrc="/article/UploadPic/2020-5/202051013502101.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">答案:【<imgsrc="/article/UploadPic/2020-5/202051013502813.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">10、问题:已知随机变量<imgsrc="/article/UploadPic/2020-5/202051013502433.png"alt=""border="0"onload="returnimgzoom(this,600);"style="cursor:pointer;"onclick="javascript:window.open(this.src);">的期望<imgsrc="/article/UploadPic/2020-5/202051013502772.png"alt=""border="0"onload="returnimgzoom(this,600)