6. For a random variable X, Var(X) =11 and E(X2) = 36. Find the mean of X . 试题详情 5.Suppose that a random variable X is such that E(X) = 5.7 and Var(X) = 2.5. Suppose further that Y is a random variable such that Y = 4 2X. Find E(Y) and Var(Y) . ...
Question: Find the distribution of the random variable X and its parameters values for each of the followingmoment-generating functions. Find the mean and variance. (b) Mx(t)=e5t4+169t2 Find the distribution of the random variable X and its...
Mean is the average value of the given set of observations. In statistics, we also come across different types of mean such as Arithmetic, Geometric and Harmonic mean. Leant how to find the mean here.
For a binomial random variable B(n=12, p=0.5), find out the mean and variance. Mean Variance ()①A. 6 3 ②B. 7 3.5 ③C. 8 4 A. ① B. ② C. ③ 相关知识点: 试题来源: 解析 A A binomial random variable has an expected value or mean equal to np and variance equal to...
Let X be a random variable with pdf given below. Find the mean of X. f(x) = 1/2 , 0 < x < 2. a random variable X with PDF ? fX(x)=2(1?x) 10?x?1 = ? 2(1?x), 0? x?1 ? 0, otherwise. and used the ?Method...
Suppose the random variable X has the distribution given in the table below x 2 3 5 7 11 13 p(x) 0.15 0.25 0.15 0.10 0.30 0.05 a. Find the mean, variance, and standard deviation of {eq}X {/eq}. b. Suppose ...
Find the mean and standard deviation for the following probability distribution. x P(x) 0 0.07 1 0.28 2 0.43 3 0.22Discrete probability distributionIn discrete probability distribution, random variable X takes limited values. Each value of X has a correspondin...
解析 For Poisson variable X,we know that E{X}=λ and Var{X}=λ too.Therefore,E{X^2} = Var{X}+(E{X})^2 = 10+10^2 = 110.结果一 题目 泊松分布的一道题目 Let X be a poisson random variable with mean equal to 10.find E[X^2] 该如何求? 答案 For Poisson variable X,we ...
(C) X is discrete uniform (1.3) when X>0. X is discrete uniform (-3,-2) when X<0. If P[X>-0)-0.6, find the mean of X For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). B IVParagraph Arial 10pt А LI:...
The mean formula to find the mean of a grouped set of data can be given as, x̄ = Σfix/iΣfi, where, x̄ is the mean, fiis frequency of a class and xiis mid-interval value of corresponding class. What is Population Mean Symbol?