Homework Help: Math

Posted by Rob on Tuesday, November 15, 2011 at 12:00am.

Random variables X and Y are both normally distributed with mean 100 and standard
deviation 4. It is known that random variable X+Y is also a normal distribution.
a. What is the mean of X+Y?
b. What is the standard deviation of X+Y?

I see that the mean is 200 but I don't know how it arrived to.

No one has answered this question yet.

Answer this Question

Related Questions

Statisitcs - The mean height of fully grown birch trees are 18 feet with a ...
BUSINESS STATISTICS - The random variable x is normally distributed with mean =1...
BUSINESS STATISTICS - The random variable x is normally distributed with mean =1...
Statistics - Given that x is a normally distributed random variable with a mean ...
Stats - Suppose the time it takes for a purchasing agent to complete an online ...
Math - Assume that a population is normally distributed with a mean of 100 and a...
Statistics - I am so lost on this statistics question would someone help me ...
statistics - the random variable x is normally distributed with a mean of 75 and...
statistics - the dean of admissions in a large university has determined that ...
statistics - The most common intelligence quotient (IQ) scale is normally ...

For Further Reading

First Name:
School Subject:
Answer: