# Question: With reference to Exercise 3 47 on page 90 find E 2X

With reference to Exercise 3.47 on page 90, find E(2X – Y).

## Answer to relevant Questions

With reference to Exercise 3.62 on page 91, find the expected value of U = X + Y + Z. Find µ'r and σ2 for the random variable X that has the probability density The extent to which a distribution is peaked or flat, also called the kurtosis of the distribution, is often measured by means of the quantity α4 = µ4/σ4 Use the formula for µ4 obtained in Exercise 4.25 to find α4 for ...Show that if a random variable has the probability density f(x) = 1/2 e–|x| for –∞ < x < ∞ Its moment-generating function is given by For k random variables X1, X2, . . . , Xk, the values of their joint moment- generating function are given by E(et1X1+ t2X2+ · · · + tkXk) (a) Show for either the discrete case or the continuous case that the partial ...Post your question