X is a random variable with E(x) = 1.5 and σ = 0.8 E(7-4X+2X^2) =Complete the sentence by typing your answers into the textboxesX is a random variable with E(x) = 1.5 and σ = 0.8E(7-4X+2X^2) = (specify with 2 digits)回答的第一条 错误 算出

random random 那句话是:My favorite random fact is. X is a random variable with E(x) = 1.5 and σ = 0.8 E(7-4X+2X^2) =Complete the sentence by typing your answers into the textboxesX is a random variable with E(x) = 1.5 and σ = 0.8E(7-4X+2X^2) = (specify with 2 digits)回答的第一条 错误 算出 统计学,英文,A random variable X is given such that X ∼ N(82,126).a.One of the different values of X is chosen at random.If this value can be rounded to the nearest whole number,what is the probability that this whole number is 84?b.If we t what is Simple Random Sample 求教一道统计学数学题.Suppose X and Y are random variables such that the atandard deviation of X is 2 and the standard deviation of Y is 5.Consider a random variable Z defined as Z=3X-2Y+5.问 a:Assume that X and Y are independtly distribute random Looking for a random person. 求二维联合概率密度函数具体题目如下：（英文的,Suppose that a point (X,Y) is chosen at random from the rectangle S defined as follows:S={(x,y):0 英语翻译it is the sum of a lattice of random amplitudebasis functions of the corresponding DWT synthesis filter. 在Verilog 里 A=$random是什么意思 a random draw什么意思啊 A RANDOM WALK DOWN WALL STREET怎么样 蒲丰投针的Mathematica实现求代码,我自己编了一个,但出不来,程序如下F[n_] :=(For[i = 1,i < n,i++,x = Random[-5,5];y = Random[-5,5];a = Random[0,2 Pi];x1 = x + 0.25 Sin[a]; x2 = x - 0.25 Sin[a];y1 = y + 0.25 Cos[a]; y2 = y - 0.25 一道sat数学真题,if a number is chosen at random from the set {-12,-6,0,6,12}.what is the probability thatit is a member of the solution set of both 2x-3-6?(A)0 (B) 1/5 (C) 2/5(D) 3/5 (E)4/5c是对的， 英语翻译A point in the plane with coordinates (x,y),where x and y are integers having numerical values less than or equal to four,i.e.,|x| ≤ 4 and |y| ≤ 4,is chosen at random.What is the probability that the distance of the point form the ori 二项式分布If x is a normal random variable with mean 80 and standard deviation 5,the z-score for x = 88 is ___________ .Select one:A.-1.8B.1.6C.-1.6D.8.0E.1.8我主要是不理解到底要不要再乘根号下N,即为样本呢?不用是因为是 random variable X is normally distributed,with a mean of 25 and a standard deviation of 4.Which of the following is cloest to the inter-quartile range for this distribution?A 25-22.3=2.7 B 27.7-22.3=5.4 C 27.7/22.3=1.24 D 2(4)=8 E 37-13=24 if a number is selected at random from the list above,what is the possiblity that it will be less than 3/8.1/2.5/8.3/4.1SAT数学.