# Question: If X and Y have a bivariate normal distribution and

If X and Y have a bivariate normal distribution and U = X + Y and V = X – Y, Find an expression for the correlation coefficient of U and V.

## Answer to relevant Questions

If X and Y have a bivariate normal distribution, it can be shown that their joint moment– generating function (see Exercise 4.48 on page 139) is given by Verify that (a) The first partial derivative of this function with ...If a company employs n salespersons, its gross sales in thousands of dollars may be regarded as a random variable having a gamma distribution with α = 80√n and β = 2. If the sales cost is $ 8,000 per salesperson, how ...If the annual proportion of new restaurants that fail in a given city may be looked upon as a random variable having a beta distribution with α = 1 and β = 4, find (a) The mean of this distribution, that is, the annual ...(a) Use a computer program to find the probability that a random variable having the normal distribution with the mean –1.786 and the standard deviation 1.0416 will assume a value between – 2.159 and 0.5670. (b) ...Use the normal approximation to the binomial distribution to determine (to four decimals) the probability of getting 7 heads and 7 tails in 14 flips of a balanced coin. Also refer to Table I on pages 487– 491 to find the ...Post your question