Find the variance of the sum and difference

Assignment Help Electrical Engineering

Reference no: EM13230061

Two random variables have zero mean and variance of 16 and 36. Their correlation coefficient is 0.5. A). find the variance of the sum. B). find the variance of their difference C). Repeat (a) and (b) if the correlation coefficient is -0.5

Reference no: EM13230061

Questions Cloud

Identify four potential unethical actions : Identify four potential unethical actions or inactions related to capacity planning, and the ethical principle each violates.

Write an instruction sequence to subtract the 4-byte number : Write an instruction sequence to subtract the 4-byte number stored in memory locations 0x10-0x13 from the 4-byte number stored in memory locations 0x00-0x03 and store the difference in memory locations 0x20-0x2

Determine the correlation coefficient for x and y : A random variable X has a variance of 9 and a statistically independent random variable Y has a variance of 25. Their sum is another random variable Z=X+Y. Without assuming that either random variable has a zero mean

What is the firms break-even point in sales dollars : If sales should increase by 30 percent, by what percent would earnings before taxes (and net income) increase?

Find the variance of the sum and difference : Two random variables have zero mean and variance of 16 and 36. Their correlation coefficient is 0.5. A). find the variance of the sum. B). find the variance of their difference C). Repeat (a) and (b) if the correlation coefficient is -0.5

What is the cash ratio : Slighty Used Goods has Cash of $2,150 inventory of $28,470, fixed assets of $9,860, accounts payable of $11,900, and account receivable of $4,660. What is the cash ratio?

Determine the economic order quantity : A jewelry firm buys semiprecious stones to make bracelets and rings. The supplier charges $20 per stone, annual carrying costs are 50%, and the cost of processing orders is $40. The jewelry firm operates 200 days per year and their usage rate is 3..

Determine the joint probability distribution function : Two random variables X and Y have a joint probability density function given by f(x,y) =kxy 0

What factors have contributed to its success : Assess the extent to which Staples has developed a successful multichannel atrategy. What factors have contributed to its success?

User Account

All Pages