# Question

Find the mean of the random variables described by each of the following probability mass functions:

(a)

(b)

(c)

(d)

(a)

(b)

(c)

(d)

## Answer to relevant Questions

Prove that all odd central moments of a Gaussian random variable are equal to zero. Furthermore, develop an expression for all even central moments of a Gaussian random variable. Suppose θ is a random variable uniformly distributed over the interval [0, 2π). (a) Find the PDF of Y = sin (θ). (b) Find the PDF of Z = cos (θ). (c) Find the PDF of W = tan (θ). A uniform random variable has a PDF given by fX (x) = u(x) – u (x – 1). (a) Find the mean and variance of X. (b) Find the conditional mean and the conditional variance given that 1 / 2 < X < 3 / 4. Let X be a Gaussian random variable with zero mean and arbitrary variance, σ2. Given the transformation Y= X3, find fY (y). A pair of random variables,(X , Y) , is equally likely to fall anywhere in the ellipse described by 9X2 + 4 Y2 < 36. (a) Write the form of the joint PDF, fX,Y (x, y). (b) Find the marginal PDFs, fX (x) and FY (y). (c) Find ...Post your question

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