4.Suppose that X is a random variable for which E(X)=µ and Var(X)=o². Show that E(X(X-1)]=µ(µ-1)+o?

Q: Let a r.v. have a mean of -1 and a standard deviation of 2. For the corresponding m.g.f. M(z), write…

A: mean =-1 and standard deviation =2 Then we have to find the generating function of z and it's…

Q: (3) Derive a general expression for the variance of net future loss Var(L) with a constant force of…

A: Variance of net future lossThe constant force of interestA general expression for  needed to be…

Q: 7. Let M(t)=(1/6)et +(2/6)e²t+(3/6)e³t (Moment generating function of X) a. Find E(x) b. Find…

A:

Q: 6. Let X be a random variable having pdf :{ (a) (b) (d) fx(x) = A exp{-X(x-μ)} 0 Show that fx(x) is…

A:

Q: Let X and Y be statistically independent random variables with Var(X) = 4 and Var(Y) = 10. We do not…

A: The provided information is as follows:. and  are independent random variables..

Q: No, this solution is not correct. The variance of an exponentially distributed random variable is…

A: We are given that L is exponentially distributed with a mean of 1/Y, where Y has a gamma…

Q: If E(X) = 6 and E[(X) (X-1) ] = 51, find the second moment= 1 and the variance of X= 2

A: Given Data: E(X)=6 E[(X) (X-1)]=51

Q: 6. Suppose that X is an Exponential with rate 1 and that, given X = x, Y is an Exponential with rate…

A:

Q: Let X₁, X₂,..., Xn be a random sample from an exponential distribution with the pdf e-/, for 0 < x…

A: Given that The probability density function of X f(x,β)=1/βe-x/β. 0&lt;x&lt;We have to find the…

Q: Suppose that Y₁ = 0.5, Y₂ = 0.6, Y3 = 0.2, Y4 = 0.7 and Y5 = 0.6, represents a random sample. Each…

A: Solution

Q: 4. If the random variable X has an show that for a > 0, b>0, exponential distrib f(x) = x/4, for x ≥…

A: For the random variable X~Exponential1λ, it is given that: fx=1λe-xλ, for x≥0

Q: If the moment-generating function of X is M(t) = {e¹ + find the mean, variance, and pmf of X. 2t

A:

Q: Assume δ = 0.05, ̄Ax = 0.06, 2 ̄Ax = 0.0040. A group of 100 lives age x purchase fully continuous…

A: Given  δ=0.05 A¯x=0.06 A¯x2=0.0040 Benefit=$1000 Premium=$3.50

Q: Let X₁, Xn be a random sample from the beta distribution with a = B = 0 and = = {0: 0= 1,2}. Show…

A:

Q: 2. Suppose X1, X2, ..., Xn be a random sample from the following pdf: 1/2 f(2\4, A) = ()" exp[-\(x –…

A: It is an important part of statistics. It is widely used.

Q: 7. If x1, x2 and x3 are three variates measured from their respective means as origin and if e, is…

A:

Q: 6. Show that a gamma distribution with a > 1 has a relative maximum at x = (a- 1)ß. What happens…

A: Relative maximum =? For a gamma distribution for alpha&gt;1

Q: If In a + In(z-7) = In(4x), then z = 11 %3D

A: Since you have posted more than one question we solved the first one for you. For the remaining…

Q: In SD(X-mu/sigma)=1/sigma * SD(X) What happened to the mean mu?

A:

Q: Suppose that a random variable X has the following moment generating function, Mx (t) = (1-9t)−7, t<…

A:

Q: 3. Consider two random variables X₁ and X₂ whose joint pdf is given by 11/2 for x₁ > 0, x2 > 0, x1 +…

A: We are given joint PDF of X1 and X2 as,f(x1,x2)=12;for x1&gt;0 and x2&gt;0, x1+x2&lt;0…

Q: Suppose X is a random variable with following pdf: f(x)= pe-x+2(1-p)e-2x;  x>0          0,…

A: The probability distribution function is : f(x)=pe-x+2(1-p)e-2x,x&gt;0 The cumulative distribution…