距离下一次FRM考试还有
000

FRM 定量分析习题测评(一):Suppose that a quiz consists of 20 true-fals

发表时间:2017-12-15 15:25
作者:FRM
告诉小伙伴
Suppose that a quiz consists of 20 true-false questions.A student has not studied for the exam and just randomly guesses the answers.How would you find the probability that the student will get 8 or fewer answers correct?
 
A.Find the probability that X=8 in a binomial distribution with n=20 and p=0.5.
 
B.Find the area between 0 and 8 in a uniform distribution that goes from 0 to 20.
 
C.Find the probability that X=8 for a normal distribution with mean of 10 and standard deviation of 5.
 
D.Find the cumulative probability for 8 in a binomial distribution with n=20 and p=0.5.


----------------------------------------------------------我-是--萌--萌--的--分--割--线----------------------------------------------------------

2.Answer:D
 
Explanation:A binomial distribution is a probability distribution,and it refers to the various probabilities associated with the number of correct answers out of the total sample.
 
The correct approach is to find the cumulative probability for 8 in a binomial distribution with N=20 and p=0.5.
 
The cumulative probability is to be calculated on the basis of a binomial distribution with number of questions
 
(n)equaling 20 and probability of a singleevent occurring being 50%(p=0.5).

 
声明丨本文由FRM考试网(frm.gaodun.cn)精编整理,未经许可不得随意转载或引用。

报名、考试时间

2018年05月2018年11月
报名时间 第一阶段:2017.12.1~18.1.31
第二阶段:2018.02.01~02.28
第三阶段:2018.30.01~04.15
考试时间 2018年05月19日(周六)
成绩查询 2018年06月28日(周四)
报名时间2 第一阶段:2018.05.1~07.31
第二阶段:2018.08.01~08.31
第三阶段:2018.09.01~10.15
考试时间 2018年11月17日(周六)
成绩查询 2019年01月03日(周四)
  • 2017年FRM考试
  • FRM考试网